Engineering beta-ketoacyl ACP synthase for novel substrate specificity

ABSTRACT

Methods of altering substrate specificity of beta-ketoacyl-ACP synthase, and engineered beta-ketoacyl-ACP synthases so produced are provided. DNA sequences and constructs for expression of engineered beta-ketoacyl-ACP synthases, as well as the novel beta-ketoacyl-ACP synthases produced therefrom are also provided. Such DNA sequences may be used for expression of the engineered beta-ketoacyl-ACP synthases in host cells, particularly seed cells of oilseed crop plants, for the modification of fatty acid composition.

[0001] This application claims the benefit of U.S. Provisional Application No. 60/138,308 filed Jun. 9, 1999.

TECHNICAL FIELD

[0002] The present invention is directed to proteins, nucleic acid sequences and constructs, and methods related thereto.

BACKGROUND

[0003] Fatty acids are organic acids having a hydrocarbon chain of from about 4 to 24 carbons. Many different kinds of fatty acids are known which differ from each other in chain length, and in the presence, number and position of double bonds. In cells, fatty acids typically exist in covalently bound forms, the carboxyl portion being referred to as a fatty acyl group. The chain length and degree of saturation of these molecules is often depicted by the formula CX:Y, where “X” indicates number of carbons and “Y” indicates number of double bonds.

[0004] The production of fatty acids in plants begins in the plastid with the reaction between acetyl-CoA and malonyl-ACP to produce acetoacetyl-ACP catalyzed by the enzyme, βketoacyl-ACP synthase III. Elongation of acetyl-ACP to 16- and 18- carbon fatty acids involves thefollowing cycle of reactions: condensation with a two-carbon unit from malonyl-ACP to form a βketoacyl-ACP (β-ketoacyl-ACP synthase), reduction of the keto-function to an alcohol (β-ketoacyl-ACP reductase), dehydration to form an enoyl-ACP (β-hydroxyacyl-ACP dehydrase), and finally reduction of the enoyl-ACP to form the elongated saturated acyl-ACP (enoyl-ACP reductase). β-ketoacyl-ACP synthase I, catalyzes elongation up to palmitoyl-ACP (C16:0), whereas β-ketoacyl-ACP synthase II catalyzes the final elongation to stearoyl-ACP (C18:0). The longest chain fatty acids produced by the FAS are typically 18 carbons long. Additional biochemical steps in the cell produce specific fatty acid constituents, for example through desaturation and elongation.

[0005] β-ketoacyl synthases, condensing enzymes, comprise a structurally and functionally related family that play critical roles in the biosynthesis of a variety of natural products, including fatty acids, and the polyketide precursors leading to antibiotics, toxins, and other secondary metabolites. β-ketoacyl synthases catalyze carbon-carbon bond forming reactions bycondenisng a variety of acyl chain precursors with an elongating carbon source, usually malonyl or methyl malonyl moieties, that are covalently attached through a thioester linkage to an acyl carrier protein. Condensing enzymes can be part of multienzyme complexes, domains of large, multifunctional polypeptide chains as the mammalian fatty acid synthase, or single enzymes as the β-ketoacyl synthases in plants and most bacteria.

[0006] Condensing enzymes have been identified with properties subject to exploitation in the areas of plant oil modification, polyketide engineering, and ultimately design anti-cancer and anti-tuberculosis agents. One of the molecular targets of isoniazid, which is widely used in the treatment of tuberculosis, is KAS. Cerulinin, a mycotoxin produced by the fungus Cephalosporium caerulens, acts as a potent inhibitor of KAS by covalent modification of the active cysteine thiol. Condensing enzymes from many other pathways and sources have all been shown to be inactivated by this antibiotic with the exception of the synthase from C. caerulens and KASIII, the isozyme responsible for the initial condensation of malonyl-ACP with acetyl-CoA in plant and bacterial fatty acid biosynthesis. Inhibition of the KAS domain of fatty acid synthase by cerulinin is selectively cytotoxic to certain cancer cells.

SUMMARY OF THE INVENTION

[0007] The present invention is directed to β-ketoacyl ACP synthase (KAS), and in particular to engineered KAS polypeptides and polynucleotides encoding engineered KAS proteins having a modified substrate specificity with respect to the native (also referred to herein as wild-type) KAS protein. The engineered polypeptides and polynucleotides of the present invention include those derived from plant and bacterial sources.

[0008] In another aspect of the invention polynucleotides encoding engineered polypeptides, particularly, polynucleotides that encode a KAS protein with a modified substrate specificity with respect to the native KAS protein, are provided.

[0009] In a further aspect the invention relates to oligonucleotides derived from the engineered KAS proteins and oligonucleotides which include partial or complete engineered KAS encoding sequences.

[0010] It is also an aspect of the present invention to provide recombinant DNA constructs which can be used for transcription or transcription and translation (expression) of an engineered KAS protein having an altered substrate specificity with respect to the native KAS protein. In particular, constructs are provided which are capable of transcription or transcription and translation in host cells. Particularly preferred constructs are those capable of transcription or transcription and translation in plant cells.

[0011] In another aspect of the present invention, methods are provided for production of engineered KAS proteins having a modified substrate specificity with respect to the native KAS in a host cell or progeny thereof. In particular, host cells are transformed or transfected with a DNA construct which can be used for transcription or transcription and translation of an engineered KAS. The recombinant cells which contain engineered KAS are also part of the present invention.

[0012] In a further aspect, the present invention relates to methods of using the engineered polynucleotide and polypeptide sequences of the present invention to modify the fatty acid composition in a host cell, as well as to modify the composition and/or structure of triglyceride molecules, particularly in seed oil of oilseed crops. Plant cells having such a modified triglyceride content are also contemplated herein.

[0013] The modified plants, seeds and oils obtained by the expression of the plant engineered KAS proteins are also considered part of the invention.

DESCRIPTION OF THE FIGURES

[0014]FIG. 1 provides the coordinates of the crystal structure of the E. coli KAS protein. The first column provides the Type of atom (N=Nitrogen, O=oxygen, C=Carbon, CA=alpha carbon, CB=beta carbon, CG=gamma carbon, CD=delta carbon, CE=epsilon carbon, NZ=zeta nitrogen, NH=amino group), the second column provides the amino acid residue type (three letter abbreviation), the third column provides the subunit in which the amino acid is located, the forth column provides the amino acid position in the protein sequence base don the mature unprocessed protein, columns seven through nine provide the x, y and z coordinates, respectively, of the three dimensional location of the respective atom in the crystal structure.

[0015]FIG. 2 provides the profile of the crystal structure of the E. coli KAS-cerulenin complex. The first column provides the Type of atom N=Nitrogen, O=oxygen, C=Carbon, CA=alpha carbon, CB=beta carbon, CG=gamma carbon, CD=delta carbon, CE=epsilon carbon, NZ=zeta nitrogen, NH=amino group), the second column provides the amino acid residue type (three letter abbreviation), the third column provides the subunit in which the amino acid is located, the forth column provides the amino acid position in the protein sequence base don the mature unprocessed protein, columns seven through nine provide the x, y and z coordinates, respectively, of the three dimensional location of the respective atom in the crystal structure.

[0016]FIG. 3 provides the effects of KAS II mutations on the fatty acid composition of E. coli.

[0017]FIG. 4 shows that mutations I108F, I108L and A193M all cause significant reduction in the activity of KAS II on 8:0-ACP as compared to 6:0-ACP (38, 31 and 12 fold reductions respectively), without significantly reducing the activity on 6:0-ACP.

[0018]FIG. 5 shows that the combined mutations at I108 and A193 have the effect of reducing the activity of KAS II on 6:0-ACP substrates.

[0019]FIG. 6 shows that the combined effect of two or more mutations had a greater effect on the activity with acyl-ACPs 8:0 and longer (14:0) substrates.

[0020]FIG. 7 shows the complete list of mutations that were generated.

[0021]FIG. 8 provides the structure of the Cpu KAS I homodimer

[0022]FIG. 9 provides the structure of the Cpu KAS IV homodimer

[0023]FIG. 10 provides the structure of the Cpu KAS I/Cpu KAS IV heterodimer.

[0024]FIG. 11 provides the sequence differences in the hydrophobic pocket of the E. coli KASII and C. pu KASIV.

[0025]FIG. 12 provides an amino acid sequence alignment of KAS protein sequences from plant (Arabidopsis, Brassica, Cuphea hookeriana and pullcherima, Hordeum, Riccinus), bacterial (E. coli, streptococcus, tuberculosis), mammalian (rat, mouse) and others (C. elegans).

[0026]FIG. 13 provides a bar graph representing the results of fatty acid analysis of seeds from transformed Arabidopsis lines containing pCGN11058, pCGN11062, pCGN11041, or nontransformed control lines (AT002-44). For each line, bars represent, from left to right, C12:0, C14:0,C16:0,C16:1,C18:0, C18:1 (delta 9), C18:1 (delta 11), C18:2, C18:3, C20:0, C20:1 (delta 11), C20:1 (delta 13), C20:2, C20:3, C22:0, C22:1, C22:2, C22:3, C24:0, and C24:1 fatty acids.

[0027]FIG. 14 provides the nucleotide sequence of the plastid targeting sequence from Cuphea hookeriana KASII-7.

DETAILED DESCRIPTION OF THE INVENTION

[0028] In accordance with the subject invention, engineered nucleotide sequences are provided which are capable of coding sequences of amino acids, such as, a protein, polypeptide or peptide. The engineered nucleotide sequences encode β-ketoacyl-ACP synthase (KAS) proteins with a modified substrate specificity compared to the native KAS protein (also referred to herein as the wild-type KAS protein) under enzyme reaction conditions. Such sequences are referred to herein as engineered β-ketoacyl-ACP synthase (also referred to as engineered KAS) proteins. The engineered nucleic acid sequences find use in the preparation of constructs to direct their expression in a host cell. Furthermore, the engineered nucleic acid sequences find use in the preparation of plant expression constructs to alter the fatty acid composition of a plant cell. By “enzyme reactive conditions” is meant that any necessary conditions are available in an environment (for example, such factors as temperature, pH, lack of inhibiting substances) which will permit the enzyme to function.

[0029] An engineered β-ketoacyl-ACP synthase nucleic acid sequence of this invention includes any nucleic acid sequence coding a β-ketoacyl-ACP synthase having altered substrate specificity relative to the native KAS in a host cell, includign but not limited to, in vivo, or in a cell-like environment, for example, in vitro. By altered, or modified, substrate specificity is meant an alteration in the acyl-ACP substrates elongated by the KAS enzyme or an alteration in the elongator molecule used by the KAS to elongate the acyl-ACP relative to the native or unaltered KAS protein. An alteration in the acyl-ACP substrate elongated by the KAS enzymes includes, but is not limited to, elongation of an acyl-ACP substrate not elongated by the wild-type KAS, the inability to elongate an acyl-ACP substrate elongated by the wild-type KAS, and a preference for elongating acyl-ACP substrates not normally preferred by the wild-type KAS. An alteration in the elongator molecule used by the engineered KAS for the elongation of the acyl-ACP substrate includes, but is not limited to, methyl-malonyl ACP for the production of branched chain fatty acids.

[0030] A first aspect of the present invention relates to engineered β-ketoacyl-ACP synthase polypeptides. In particular, engineered KAS II polypeptides are provided. Preferred peptides include those found in the hydrophobic fatty acid/cerulenin binding pocket of the KAS protein. Such polypeptides include the engineered polypeptides set forth in the Sequence Listing, as well as polypeptides and fragments thereof, particularly those polypeptides which exhibit a modified substrate specificity with respect to the wild-type KAS polypeptide. Particularly preferred polypeptides include those having engineered amino acid residues 105 to 120, 130-140, 190-200 and 340-400. Most preferred polypeptides include those having engineered amino acid residues I108A, 1108F, I108G, I108L, L111A, I114A, F133A, V134A, V134G, I138A, 1138G, A162G, A193G, A193I, A193M, L197A, F202L, F202I, F202G, L342A, and L342G. Amino acid positions, as used herein, refer to the amino acid residue position in the active or processed protein.

[0031] Engineered β-ketoacyl-ACP synthases can be prepared by random (via chemical mutagenesis or DNA shuffling) or specific mutagenesis of a β-ketoacyl-ACP synthase encoding sequence to provide for one or more amino acid substitutions in the translated amino acid sequence. Alternatively, an engineered β-ketoacyl-ACP synthase can be prepared by domain swapping between related β-ketoacyl-ACP synthases, wherein extensive regions of the native β-ketoacyl-ACP synthase encoding sequence are replaced with the corresponding region from a different β-ketoacyl-ACP synthase.

[0032] Altered substrate specificities of an engineered β-ketoacyl-ACP synthase can be reflected by the elongation of an acyl-ACP substrates of particular chain length fatty acyl-ACP groups which are not elongated by the native β-ketoacyl-ACP synthase enzyme. In addition, altered substrate specificities can be reflected by the in ability to elongate an acyl-ACP substrate of particular chain length fatty acyl-ACP groups which are not normally preferred by the native β-ketoacyl-ACP synthase enzyme. The newly recognized acyl-ACP substrate can differ from native substrates of the enzyme in various ways, such as by having a shorter or longer carbon chain length (usually reflected by the addition or deletion of one or more 2-carbon units) as well as by degrees of unsaturation.

[0033] Another aspect of the present invention relates to engineered β-ketoacyl-ACP synthase polynucleotides. In particular, engineered β-ketoacyl-ACP synthase II polynucleotides are provided. The polynucleotide sequences of the present invention include engineered polynucleotides that encode the polypeptides of the invention having a deduced amino acid sequence selected from the group of sequences set forth in the Sequence Listing.

[0034] The invention provides a polynucleotide sequence identical over its entire length to each coding sequence as set forth in the Sequence Listing. The invention also provides the coding sequence for the mature polypeptide or a fragment thereof, as well as the coding sequence for the mature engineered polypeptide or a fragment thereof in a reading frame with other coding sequences, such as those encoding a leader or secretory sequence, a pre-, pro-, or prepro- protein sequence. The polynucleotide can also include non-coding sequences, including for example, but not limited to, non-coding 5′ and 3′ sequences, such as the transcribed, untranslated sequences, termination signals, ribosome binding sites, sequences that stabilize mRNA, introns, polyadenylation signals, and additional coding sequence that encodes additional amino acids. For example, a marker sequence can be included to facilitate the purification of the fused polypeptide. Polynucleotides of the present invention also include polynucleotides comprising a structural gene and the naturally associated sequences that control gene expression.

[0035] As described herein, analysis of the KAS II/cerulinin crystal structure complex is performed using modeling software to produce a profile of the complex, as well as the KAS II protein alone. Based on comparisons of the two profiles, amino acid residues are identified, which when mutagenized, alter the fatty acyl substrate specificities. As demonstrated herein, engineering of the nucleic acid sequence to modify the amino acid sequence in particular regions of the KAS protein effectively modify the substrate specificity of the engineered KAS. Particular ranges for the engineering of the protein include amino acid residues 105 to 120, 130-140, 190-200 and 340-345. Particularly, engineering of residues 108, 111, 114, 133, 193 and 197 can alter the length of the fatty acids synthesized by the engineered KAS II protein. More particularly, engineering of residues 108, 111, 114, 133, 193 and 197 with variously sized hydrophobic residues will alter the length of the fatty acids synthesized by the engineered KAS II protein. Furthermore, engineering the amino acid residue at position 400 can also have an effect on the substrate specificity.

[0036] As demonstrated more fully in the following examples, the acyl-ACP substrate specificity of b-ketoacyl-ACP synthases may be modified by various amino acid changes to the protein sequence, such as amino acid substitutions, insertions or deletions in the mature protein portion of the b-ketoacyl-ACP synthases. Modified substrate specificity can be detected by expression of the engineered b-ketoacyl-ACP synthase s in E. coli and assaying to detect enzyme activity or by using purified protein in in vitro assays.

[0037] Modified substrate specificity can be indicted by a shift in acyl-ACP substrate preference such that the engineered b-ketoacyl-ACP synthase is newly capable of utilizing a substrate not recognized by the native b-ketoacyl-ACP synthase. The newly recognized substrate can vary from substrates of the native enzyme by carbon chain length and/or degree of saturation of the fatty acyl portion of the substrate. Additionally, modified substrate specificity can be reflected by a shift in the relative b-ketoacyl-ACP synthase activity on two or more substrates of the native b-ketoacyl-ACP synthase such that an engineered b-ketoacyl-ACP synthase exhibits a different order of preference for the acyl-ACP substrates.

[0038] Furthermore, provided herein are KAS proteins with an altered elongator molecule preference. For example, by widening the hydrophobic fatty acid binding differentelongator molecules, other than Malonyl-ACP, can be utilized by the KAS protein. For example Methyl-malonyl-ACP can be utilized by the engineered KAS resulting in the synthesis of branched chained fatty acid. The mutations that lengthen the pocket may to some degree also widen it, in addition mutations A193G, I108G, L342A or G, V134A or G,F202L,I or G may well cause widening of the pocket sufficiently to allow Methyl-malonyl-ACP to be accepted as an elongator.

[0039] As described in more detail herein, alterations in the nucleic acid sequence of the E. coli KAS II, particularly, I108F, I108L, A1931, A193M, as well as combinations thereof, are prepared for the production of shorter chain length fatty acids. Furthermore, alterations of I108A, L111A, I114A, F133A, L197A, and combinations thereof, are prepared for increasing the length of fatty acids produced by the host cell.

[0040] Thus, as the result of modifications to the substrate specificity of b-ketoacyl-ACP synthases, it can be seen that the relative amounts of the fatty acids produced in a cell where various substrates are available for hydrolysis may be altered. Furthermore, molecules which are formed from available free fatty acids, such as plant seed triglycerides, may also be altered as a result of expression of engineered b-ketoacyl-ACP synthase s having altered substrate specificities.

[0041] It is anticipated that the ranges of mutations provided herein can also be engineered in plant KAS proteins as well as to other polyketide synthases. Such plant KAS proteins are known in the art, and are described for example in PCT Publication WO 98/46776, and in U.S. Pat. No. 5,475,099, the entireties of which are incorporated herein by reference.

[0042] Plant Constructs and Methods of Use

[0043] Of particular interest is the use of the nucleotide sequences, or polynucleotides, in recombinant DNA constructs to direct the transcription or transcription and translation (expression) of the engineered KAS sequences of the present invention in a host plant cell. The expression constructs generally comprise a promoter functional in a host plant cell operably linked to a nucleic acid sequence encoding a engineered KAS of the present invention and a transcriptional termination region functional in a host plant cell.

[0044] Those skilled in the art will recognize that there are a number of promoters which are functional in plant cells, and have been described in the literature. Chioroplast and plastid specific promoters, chloroplast or plastid functional promoters, and chloroplast or plastid operable promoters are also envisioned.

[0045] One set of promoters are constitutive promoters such as the CaMV35S or FMV35S promoters that yield high levels of expression in most plant organs. Enhanced or duplicated versions of the CaMV35S and FMV35S promoters are useful in the practice of this invention (Odell, et al. (1985) Nature 313:810-812; Rogers, U.S. Pat. No. 5,378,619). In addition, it may also be preferred to bring about expression of the engineered KAS in specific tissues of the plant, such as leaf, stem, root, tuber, seed, fruit, etc., and the promoter chosen should have the desired tissue and developmental specificity.

[0046] Of particular interest is the expression of the nucleic acid sequences of the present invention from transcription initiation regions which are preferentially expressed in a plant seed tissue. Examples of such seed preferential transcription initiation sequences include those sequences derived from sequences encoding plant storage protein genes or from genes involved in fatty acid biosynthesis in oilseeds. Examples of such promoters include the 5′ regulatory regions from such genes as napin (Kridl et al., Seed Sci. Res. 1:209:219 (1991)), phaseolin, zein, soybean trypsin inhibitor, ACP, stearoyl-ACP desaturase, soybean α′ subunit of β-conglycinin (soy 7s, (Chen et al., Proc. Natl. Acad. Sci., 83:8560-8564 (1986))) and oleosin.

[0047] It may be advantageous to direct the localization of proteins to a particular subceuular compartment, for example, to the mitochondrion, endoplasmic reticulum, vacuoles, chioroplast or other plastidic compartment. For example, where the genes of interest of the present invention will be targeted to plastids, such as chloroplasts, for expression, the constructs will also employ the use of sequences to direct the gene to the plastid. Such sequences are referred to herein as chloroplast transit peptides (CTP) or plastid transit peptides (PTP). In this manner, where the protein of interest is not directly inserted into the plastid, the expression construct will additionally contain a gene encoding a transit peptide to direct the protein of interest to the plastid. The chloroplast transit peptides may be derived from the gene of interest, or may be derived from a heterologous sequence having a CTP. Such transit peptides are known in the art. See, for example, Von Heijne et al. (1991) Plant Mol. Biol. Rep. 9:104-126; Clark et al. (1989) J. Biol. Chem. 264:17544-17550; della-Cioppa et al. (1987) Plant PhysioL 84:965-968; Romer et al. (1993) Biochem. Biophys. Res Commun. 196: 1414-1421; and, Shah et al. (1986) Science 233:478481. Additional transit peptides for the translocation of the engineered KAS protein to the endoplasmic reticulum (ER), or vacuole may also find use in the constructs of the present invention.

[0048] Depending upon the intended use, additional constructs can be employed containing the nucleic acid sequence which provides for the suppression of the host cell's endogenous KAS protein. Where antisense inhibition of a host cells native KAS protein is desired, the entire wild-type KAS sequence is not required.

[0049] The skilled artisan will recognize that there are various methods for the inhibition of expression of endogenous sequences in a host cell. Such methods include, but are not limited to antisense suppression (Smith, et al. (1988) Nature 334:724-726) , co-suppression (Napoli, et al. (1989) Plant Cell 2:279-289), ribozymes (PCT Publication WO 97/10328), and combinations of sense and antisense Waterhouse, et al. (1998) Proc. Natl. Acad. Sci. USA 95:13959-13964. Methods for the suppression of endogenous sequences in a host cell typically employ the transcription or transcription and translation of at least a portion of the sequence to be suppressed. Such sequences may be homologous to coding as well as non-coding regions of the endogenous sequence.

[0050] Regulatory transcript termination regions may be provided in plant expression constructs of this invention as well. Transcript termination regions may be provided by the DNA sequence encoding the wild-type KAS or a convenient transcription termination region derived from a different gene source, for example, the transcript termination region which is naturally associated with the transcript initiation region. The skilled artisan will recognize that any convenient transcript termination region which is capable of terminating transcription in a plant cell may be employed in the constructs of the present invention.

[0051] Alternatively, constructs may be prepared to direct the expression of the engineered KAS sequences directly from the host plant cell plastid. Such constructs and methods are known in the art and are generally described, for example, in Svab, et al. (1990) Proc. Natl. Acad. Sci. USA 87:8526-8530 and Svab and Maliga (1993) Proc. Natl. Acad. Sci. USA 90:913-917 and in U.S. Pat. No. 5,693,507.

[0052] A plant cell, tissue, organ, or plant into which the recombinant DNA constructs containing the expression constructs have been introduced is considered transformed, transfected, or transgenic. A transgenic or transformed cell or plant also includes progeny of the cell or plant and progeny produced from a breeding program employing such a transgenic plant as a parent in a cross and exhibiting an altered phenotype resulting from the presence of a engineered KAS nucleic acid sequence.

[0053] Plant expression or transcription constructs having an engineered KAS as the DNA sequence of interest for increased or decreased expression thereof may be employed with a wide variety of plant life, particularly, plant life involved in the production of vegetable oils for edible and industrial uses. Most especially preferred are temperate oilseed crops. Plants of interest include, but are not limited to, rapeseed (Canola and High Erucic Acid varieties), sunflower, safflower, cotton, soybean, peanut, coconut and oil palms, and corn. Depending on the method for introducing the recombinant constructs into the host cell, other DNA sequences may be required. Importantly, this invention is applicable to dicotyledyons and monocotyledons species alike and will be readily applicable to new and/or improved transformation and regulation techniques.

[0054] Of particular interest, is the use of engineered KAS constructs in plants which have been genetically engineered to produce a particular fatty acid in the plant seed oil, where TAG in the seeds of nonengineered plants of the engineered species, do not naturally contain that particular fatty acid.

[0055] The engineered KAS constructs of the present invention can also be used to provide a means for the production of plants having resistance to plant pathogens. Engineered KAS constructs providing for an increased production of particular fatty acids involved in the biosynthesis of pathogen response signals or inhibitors. For example, engineered KAS constructs providing for the increased production of C:8 fatty acids allows for the production of transgenic plants having an increased tolerance to fungal pathogens.

[0056] It is contemplated that the gene sequences may be synthesized, either completely or in part, especially where it is desirable to provide plant-preferred sequences. Thus, all or a portion of the desired structural gene (that portion of the gene which encodes the engineered protein) may be synthesized using codons preferred by a selected host. Host-preferred codons may be determined, for example, from the codons used most frequently in the proteins expressed in a desired host species.

[0057] Once the desired engineered KAS nucleic acid sequence is obtained, it may be manipulated in a variety of ways. Where the sequence involves non-coding flanking regions, the flanking regions may be subjected to resection, mutagenesis, etc. Thus, transitions, transversions, deletions, and insertions may be performed on the naturally occurring sequence. In addition, all or part of the sequence may be synthesized. In the structural gene, one or more codons may be modified to provide for a modified amino acid sequence, or one or more codon mutations may be introduced to provide for a convenient restriction site or other purpose involved with construction or expression. The structural gene may be further modified by employing synthetic adapters, linkers to introduce one or more convenient restriction sites, or the like.

[0058] The nucleic acid or amino acid sequences encoding an engineered KAS of this invention may be combined with other non-native, or “heterologous”, sequences in a variety of ways. By “heterologous” sequences is meant any sequence which is not naturally found joined to the engineered KAS, including, for example, combinations of nucleic acid sequences from the same plant which are not naturally found joined together.

[0059] The DNA sequence encoding an engineered KAS of this invention may be employed in conjunction with all or part of the gene sequences normally associated with the wild-type KAS. In its component parts, a DNA sequence encoding engineered KAS is combined in a DNA construct having, in the 5′ to 3′ direction of transcription, a transcription initiation control region capable of promoting transcription and translation in a host cell, the DNA sequence encoding engineered KAS and a transcription and translation termination region.

[0060] Potential host cells include both prokaryotic and eukaryotic cells. A host cell may be unicellular or found in a multicellular differentiated or undifferentiated organism depending upon the intended use. Cells of this invention may be distinguished by having an engineered KAS foreign to the wild-type cell present therein, for example, by having a recombinant nucleic acid construct encoding an engineered KAS therein.

[0061] The methods used for the transformation of the host plant cell are not critical to the present invention. The transformation of the plant is preferably permanent, i.e. by integration of the introduced expression constructs into the host plant genome, so that the introduced constructs are passed onto successive plant generations. The skilled artisan will recognize that a wide variety of transformation techniques exist in the art, and new techniques are continually becoming available. Any technique that is suitable for the target host plant can be employed within the scope of the present invention. For example, the constructs can be introduced in a variety of forms including, but not limited to as a strand of DNA, in a plasmid, or in an artificial chromosome. The introduction of the constructs into the target plant cells can be accomplished by a variety of techniques, including, but not limited to calcium-phosphate-DNA co-precipitation, electroporation, microinjection, Agrobacterium infection, liposomes or microprojectile transformation. The skilled artisan can refer to the literature for details and select suitable techniques for use in the methods of the present invention.

[0062] Normally, included with the DNA construct will be a structural gene having the necessary regulatory regions for expression in a host and providing for selection of transformant cells. The gene may provide for resistance to a cytotoxic agent, e.g. antibiotic, heavy metal, toxin, etc., complementation providing prototrophy to an auxotrophic host, viral immunity or the like. Depending upon the number of different host species the expression construct or components thereof are introduced, one or more markers may be employed, where different conditions for selection are used for the different hosts.

[0063] Where Agrobacterium is used for plant cell transformation, a vector may be used which may be introduced into the Agrobacterium host for homologous recombination with T-DNA or the Ti- or Ri-plasmid present in the Agrobacterium host. The Ti- or Ri-plasmid containing the T-DNA for recombination may be armed (capable of causing gall formation) or disarmed (incapable of causing gall formation), the latter being permissible, so long as the vir genes are present in the transformed Agrobacterium host. The armed plasmid can give a mixture of normal plant cells and gall.

[0064] In some instances where Agrobacterium is used as the vehicle for transforming host plant cells, the expression or transcription construct bordered by the T-DNA border region(s) will be inserted into a broad host range vector capable of replication in E. coli and Agrobacterium, there being broad host range vectors described in the literature. Commonly used is pRK2 or derivatives thereof. See, for example, Ditta, et al., (Proc. Nat. Acad. Sci, U.S.A. (1980) 77:7347-7351) and EPA 0 120 515, which are incorporated herein by reference. Alternatively, one may insert the sequences to be expressed in plant cells into a vector containing separate replication sequences, one of which stabilizes the vector in E. coli, and the other in Agrobacterium. See, for example, McBride and Summerfelt (Plant Mol. Biol. (1990) 14:269-276), wherein the pRiHRI (Jouanin, et al., Mol. Gen. Genet. (1985) 201:370-374) origin of replication is utilized and provides for added stability of the plant expression vectors in host Agrobacteriun cells.

[0065] Included with the expression construct and the T-DNA will be one or more markers, which allow for selection of transformed Agrobacterium and transformed plant cells. A number of markers have been developed for use with plant cells, such as resistance to chloramphenicol, kanamycin, the aminoglycoside G418, hygromycin, or the like. The particular marker employed is not essential to this invention, one or another marker being preferred depending on the particular host and the manner of construction.

[0066] For transformation of plant cells using Agrobacterium, explants may be combined and incubated with the transformed Agrobacterium for sufficient time for transformation, the bacteria killed, and the plant cells cultured in an appropriate selective medium. Once callus forms, shoot formation can be encouraged by employing the appropriate plant hormones in accordance with known methods and the shoots transferred to rooting medium for regeneration of plants. The plants may then be grown to seed and the seed used to establish repetitive generations and for isolation of vegetable oils.

[0067] There are several possible ways to obtain the plant cells of this invention which contain multiple expression constructs. Any means for producing a plant comprising a construct having a DNA sequence encoding the engineered KAS of the present invention, and at least one other construct having another DNA sequence encoding an enzyme are encompassed by the present invention. For example, the expression construct can be used to transform a plant at the same time as the second construct either by inclusion of both expression constructs in a single transformation vector or by using separate vectors, each of which express desired genes. The second construct can be introduced into a plant which has already been transformed with the engineered KAS expression construct, or alternatively, transformed plants, one expressing the engineered KAS construct and one expressing the second construct, can be crossed to bring the constructs together in the same plant.

[0068] Other Constructs and Methods of Use

[0069] The invention also relates to vectors that include a polynucleotide or polynucleotides of the invention, host cells that are genetically engineered with vectors of the invention and the production of polypeptides of the invention by recombinant techniques. Cell free translation systems can be employed to produce such protein using RNAs derived from the DNA constructs of the invention.

[0070] For recombinant production, host cells can be genetically engineered to incorporate expression systems or portions thereof or polynucleotides of the present invention. Introduction of a polynucleotide into a host cell can be effected by methods described in many standard laboratory manuals, such as Davis et al., Basic Methods in Molecular Biology, (1986) and Sambrook et al, Molecular Cloning: A Laboratory Manual, 2^(nd) Edition, Cold Spring Harbor Laboratory Press, Cold Spring Harbor N.Y. (1989). Such methods include, but are not limited to, calcium phosphate transfection, DEAE dextran mediated transfection, transvection, microinjection, cationic lipid-mediated transfection, electroporation, transduction, scrape loading ballistic introduction and infection.

[0071] Representative examples of appropriate hosts include bacterial cells, such as streptococci, staphylococci, enterococci, E. coli, streptomyces, and Bacillus subtilis cells; fungal cells, such as yeast cells and Aspergillus cells; insect cells, such as Drosophila S2 and Spodoptera Sf9 cells; animal cells such as CHO, COS, HeLa, C127, 3T3, BHK, 293 and Bowes melanoma cells; and plant cells as described above.

[0072] A variety of expression systems can be used to produce the polypeptides of the invention. Such vectors include, but are not limited to, chromosomal, episomal, and virus derived vectors, for example vectors from bacterial plasmids, bacteriophage, transposons, yeast episomes, insertion elements, yeast chromosomal elements, viruses such as baculoviruses, papova viruses, such as SB40, vaccinia viruses, adenoviruses, fowl pox viruses, pseudorabies viruses and retroviruses, and vectors derived from combinations of such viruses, such as those derived from plasmid and bacteriophage genetic elements, such as cosmids and phagemids. The expression system constructs may contain control regions that regulate as well as engender expression. Generally, any system or vector which is suitable to maintain, propagate or express polynucleotides and/or to express a polypeptide in a host can be used for expression. The. appropriate DNA sequence can be inserted into the chosen expression by any of a variety of well-known and routine techniques, such as, for example, those set forth in Sambrook et al, Molecular Cloning, A Laboratory Manual, (supra).

[0073] Appropriate secretion signals, either homologous or heterologous, can be incorporated into the expressed polypeptide to allow the secretion of the protein into the lumen of the endoplasmic reticulum, the periplasmic space or the extracellular environment.

[0074] The polypeptides of the present invention can be recovered and purified from recombinant cell cultures by any of a number of well known methods, including, but not limited to, ammonium sulfate or ethanol precipitation, acid extraction, anion or cation exchange chromatography, phosphocellulose chromatography, hydrophobic interaction chromatography, affinity chromatography, hydroxylapatite chromatography, and lectin chromatography. It is most preferable to use high performance liquid chromatography (HPLC) for purification. Any of the well known techniques for protein refolding can be used to regenerate an active confirmation if the polypeptide is denatured during isolation and/or purification.

[0075] The engineered KAS polynucleotides and polypeptides of the present invention find use in a variety of applications.

[0076] The engineered KAS polynucleotides and polypeptides as well as the constructs containing such engineered KAS polynucleotides and polypeptides find use in the alteration of fatty acid composition. Furthermore, the engineered KAS polynucleotides and polypeptides of the present invention find use in the production of particular fatty acid components. For example, an engineered KAS having a preference for elongating 6, 8, 10, and 12 carbon acyl-ACP substrates can be used in the production of medium chain fatty acids. Such engineered KAS polynucleotides and polypeptides can also be used with additional sequences for the production of medium chain fatty acids, including, but not limited to, medium chain specific thioesterases (see for example U.S. Pat. No. 5,512,482).

[0077] The present invention further provides methods for the engineering of polyketides and for the identification of molecules useful in cancer therapy, immunosuppressants, anti-parasite, and antibiotic production.

[0078] Thus, the present invention permits the use of molecular design techniques to design, select and synthesize chemical entities and compounds, including inhibitory compounds, capable of binding to the active site or substrate binding site of KAS, in whole or in part.

[0079] A first approach enabled by this invention, is to use the structure coordinates of KAS to design compounds that bind to the enzyme and alter the physical properties of the compounds in different ways, e.g., solubility. For example, this invention enables the design of compounds that act as competitive inhibitors of the KAS enzyme by binding to, all or a portion of, the active site of KAS. This invention also enables the design of compounds that act as uncompetitive inhibitors of the KAS enzyme. These inhibitors may bind to, all or a portion of, the substrate binding site of KAS already bound to its substrate and may be more potent and less non-specific than known competitive inhibitors that compete only for the KAS active site. Similarly, non-competitive inhibitors that bind to and inhibit KAS whether or not it is bound to another chemical entity may be designed using the structure coordinates of KAS of this invention. Additionally, reversible and irreversible inhibitors can also be designed.

[0080] A second design approach is to probe KAS with molecules composed of a variety of different chemical entities to determine optimal sites for interaction between candidate ICE inhibitors and the enzyme. For example, high resolution X-ray diffraction data collected from crystals saturated with solvent allows the determination of where each type of solvent molecule sticks. Small molecules that bind tightly to those sites can then be designed and synthesized and tested for their KAS inhibitor activity. Travis, J., Science, 262, p. 1374 (1993).

[0081] This invention also enables the development of compounds that can isomerize to short-lived reaction intermediates in the chemical reaction of a substrate or other compound that binds to KAS, with KAS. Thus, the time-dependent analysis of structural changes in KAS during its interaction with other molecules is enabled. The reaction intermediates of KAS can also be deduced from the reaction product in co-complex with KAS. Such information is useful to design improved analogues of known KAS inhibitors or to design novel classes of inhibitors based on the reaction intermediates of the KAS enzyme and KAS-inhibitor co-complex. This provides a novel route for designing KAS inhibitors with both high specificity and stability.

[0082] Another approach made possible and enabled by this invention, is to screen computationally small molecule data bases for chemical entities or compounds that can bind in whole, or in part, to the KAS enzyme. In this screening, the quality of fit of such entities or compounds to the binding site may be judged either by shape complementarity or by estimated interaction energy. Meng, E. C. et al., J. Comp. Chem., 13, pp. 505-524 (1992).

[0083] The invention now being generally described, it will be more readily understood by reference to the following examples which are included for purposes of illustration only and are not intended to limit the present invention.

EXAMPLES Example 1 Determination of the KAS II-Cerulenin Complex Structure

[0084] The KASII-cerulenin complex was prepared as described previously (Edwards, et al. (1997) FEBS Lett. 402:62-66). Crystals of the complex were grown by the hanging drop method. Droplets consisting of equal amounts of protein solution (6 mg ml⁻¹, 21 protein, 0.3 MNaCl, 25 mM Tris, pH 8.0, 5 mM imidazole, and 10% v/v glycerol) and reservoir solution were equilibrated against 26% w/v polyethylene glycol 8000 and 0.1% v/v 2-mercaptoethanol in water. Data from two crystals were collected at 298 K at the synchrotron in MAX-lab, beamline I711, in Lund. The data was processed with DENZO (Otwinowski (1993) Proceedings of the Collaborative Computating Project 4 Study Weekend: Data Collection and Processing (Sawyer, L., Isaacs, N., and Bailey, S. S., eds.) pp 56-62, SERC Daresbury Laboratory, Warrington) and programs from the Collaborative Computating Project 4 Suite (Collaborative Computating Project 4 (1994) Acta Crystallagr. Sect. D Biol. Crystallogr. 50:760-763) and the two data sets were scaled together in SCALA (Eavans, (1993) Proceedings of the Collaborative Computating Project 4 Study Weekend: Data Collection and Processing (Sawyer, L., Isaacs, N., and Bailey, S. S., eds.) pp 56-62, SERC Daresbury Laboratory, Warrington). The crystals are very radiation-sensitive, but cannot be frozen in a cryostream. Due to non-isomorphism, data of only two crystals could be merged. The crystals of the complex have space group P321 with similar cell dimensions as the native enzyme. The coordinates of the native enzyme (Huang, et al. (1998) EMBO J. 17:1183-1191) were used to calculate initial electron density maps with SIGMAA (Read (1986) Acta Crystallogr. 42:140-149). All data were used in the refinement; no sigma cutoff was applied. After an initial cycle of positional refinement, the model was rebuilt and a model of cerulenin was included. Further cycles of refinement of the complex were carried out using the program REFMAC (Murshudov, et al. (1997) Acta Crystallagr. Sect. D Biol. Crystallogr 53:240-253) including a bulk solvent correction, interspersed with inspection and correction of the model using O (Jones, et al. (1991) Acta Crystallagr. Sect. A 47:100-119), OOPS (Kleywegt, et al. (1996) Acta Crystallagr. Sect. D Biol. Crystallogr 52:829-832), and PROCHECK (Laskowski, et al. (1993) J. Appl. Crystallogr. 26:282-291). Structure comparisons were performed using O (Jones, et al. (1991) supra) with default parameters.

[0085] The complex of KASII from E. coli with cerulenin crystallized in space group P3,21 isomorphously with the native enzyme (Huang, et al.(1998) supra), and the crystal structure was determined to 2.65-Å resolution by difference Fourier methods. The final protein model after refinement (R-factor 5 0.213 and R_(free)5 0.270 with good stereochemistry) contains 411 out of the 412 residues of the subunit; no electron density for the N-terminal residue was found. The overall real-space correlation coefficient (Jones, et al. (1991) supra) is 0.92, and there is well defined electron density for the polypeptide chain except for some side chains on the molecular surface. The inhibitor molecule is well defined by the electron density. However, there is weaker than average electron density for the amide group and no electron density for the last carbon atom of the hydrocarbon tail, indicating considerable flexibility for the terminal methyl group.

[0086] The overall structure of the KAS dimer is unchanged upon binding of cerulenin; the root mean square deviations for the 411 Cα atoms of the subunit is 0.23 Å between the two structures. These differences are mainly localized in the active site, in particular in the loop comprising residues 398-401. The main differences in structure between the native enzyme and the cerulenin complex are in the conformation of the side chains of Phe400 (which was anticipated already from the native structure) and of Ile-108, which have completely new rotamer conformations, and in the positions of the side chains of Cys-163, His-340, and Leu-342, which also have moved substantially. These conformational changes provide access for cerulenin to the active site cysteine and open a hydrophobic pocket for the hydrophobic tail of the inhibitor. From the initial F_(e)2 F_(c)electron density map these structural changes could be readily seen as well as the binding site for the inhibitor). Cerulenin is bound covalently through its C2 carbon atom to the Cys-163 Sγatom. Its hydrocarbon tail fits in a hydrophobic pocket formed at the dimer interface. The structure of the adduct of cerulenin and cysteine, isolated by tryptic digestion of the cerulenin-fatty acid synthase complex, has been determined by NMR and mass spectroscopy (Funabashi, et al. (1989) J. Biochem.(Tokyo) 105:751-755). This study revealed that the inhibitor reacts at its C2-epoxide carbon with the SH group of cysteine and that cerulenin formed a hydroxylactam ring. The electron density observed in the KASII-cerulenin complex is not consistent with this structure. It was not possible to model bound cerulenin in the closed ring form but the open form of the inhibitor could readily be fitted to the electron density map. The hydroxylactam ring, which is formed preferably in protic solvents (Funabashi, et al. (1989) supra), is not present in the hydrophobic environment of the protein.

[0087] In the KASII-cerulenin complex, the inhibitor amide carbonyl oxygen is within hydrogen bond distance to the Nε atoms of the side chains of His-340 and His-303, while the amide NHE group does not make any close interactions. It is, however, not possible from the structure to exclude the opposite conformation and interactions for the amide group. The hydroxyl group at C3 forms a hydrogen bond to the main chain NH of Phe400. The carbonyl oxygen at C4 does not form any polar interactions, in fact, it is located in a very hydrophobic pocket formed by side chains Phe400, Phe-202, and Val-134 from the other subunit in the dimer. The binding site for the hydrophobic part of the inhibitor is also lined with hydrophobic residues: Ala-162, Gly-107, Leu-342, Phe-202, Leu-111, Ile-108, Ala-193, Gly-198; and from the second subunit in the dimer, Ile-138, Val-134, and Phe-133. The two double bonds with trans configuration give the hydrophobic tail a shape that fits to the hydrophobic groove once residue Ile-108 has changed rotamer. In comparison, binding of tetrahydrocerulenin would cost entropy, and as expected it shows more than 2 orders of magnitude less inhibitory activity (D'Agnolo, et al.(1973) Biochim. Biophys. Acta 326:155-156). The influence of the length of the hydrocarbon chain, maintaining the double bond positions, has been studied using fatty acid synthase from Saccharomyces cerevisiae (Morisaki, et al. (1993) J. Biol. Chem. 211:111-115). Cerulenin (12 carbons) had the highest inhibitory activity, with slightly decreasing binding strength upon increase in chain length. However, when increasing the length from 16 to 18 carbon atoms, the inhibition decreased by 2 orders of magnitude. The size of the hydrophobic pocket in KASII, which binds the hydrocarbon tail of cerulenin, suggests that there is space for a longer hydrophobic tail only if the side chains of Leu-111 and of Phe-133 in the second subunit change their conformation. Thus, possible differences in the sensitivity of condensing enzymes toward cerulenin might be controlled by the size of this cavity.

[0088] The structure of the cerulenin complex can be considered to mimic the intermediate formed upon reaction of KAS with the acyl-ACP. In such a complex the hydrophobic cavity would harbor the hydrocarbon tail of the acyl intermediate. The acyl hydrophobic tails will not be restricted by two double bonds (as in the case of cerulenin), and this will allow longer acyl chains to be buried in this pocket. Inspection of the active site cavity suggests that it would not be possible to harbor a linear acyl chain longer than 14 carbon atoms without structural changes. Such conformational changes must occur since KASII is able to elongate 16:1 to 18:1 (Garwin, et al. (1980) J. Biol. Chem. 255:3263-3265).

[0089] Coordinates for the KAS II crystal structure as well as the KAS-cerulenin complex were produced and are presented in FIGS. 1 and 2 respectively.

Example 2 Engineering KAS II Proteins

[0090] The structure of the E. coli KAS II-cerulenin complex was analyzed using the Swiss Pdb Viewer (SPV) modeling program, and by stereo viewing of printouts of the structure in different orientations. Using SPV each of the hydrophobic residues surrounding the bound cerulenin residue were changed to all the possible larger hydrophobic residues, and each of the rotamers for the mutant amino acids were examined for steric clashes (SPV rotamer score) with adjacent amino acids and the bound cerulenin molecule. The identified amino acids were targeted for mutagenesis for decreasing the fatty acid chain length specificity of the KAS II protein. The candidate chain length shortening mutations chosen were those that made the least steric clashes with neighboring amino acids while having the most clashes with the end 1 to 6 carbons of cerulenin.

[0091] The structure of the E.coli KAS II/cerulenin complex was studied as described above and the hydrophobic amino acid residues near the end of the cerulenin binding “pocket” were identified. These amino acids were identified for mutagenesis for the increase in fatty acid chain length recognition. The large hydrophobic residues positioned beyond the end of the cerulenin potentially preventing longer fatty acids from occupying this pocket were chosen for mutagenesis to smaller (alanine) residues.

[0092] PCR site-directed mutagenesis was performed using the Quick-Change™ site-directed mutagenesis kit (Stratagene) following the manufacturers protocol. For the preparation of the specific mutations listed in Table 1, the following oligonucleotide primers were used in the reactions. TABLE 1 I108F Sense 5′-GTGCCGCAATTGGATCCGGGTTTGGCGGCCTCGGAC (SEQ ID NO:1) Antisense 5′-GTCCGAGGCCGCCAAACCCGGATCCAATTGCGGCAC (SEQ ID NO:2) I108L Sense 5′-GTGCCGCAATTGGCTCCGGGCTTGGAGGCCTCGGACTGATCG (SEQ ID NO:3) Antisense 5′-CGATCAGTCCGAGGCCTCCAAGCCCGGAGCCAATTGCGGCAC (SEQ ID NO:4) A193I Sense 5′-GCAGGTGGCGCCGAGAAAATCAGTACGCCGCTGGGC (SEQ ID NO:5) Antisense 5′-GCCCAGCGGCGTACTGATTTTCTCGGCGCCACCTGC (SEQ ID NO:6) A193M Sense 5′-GGTGGCGCAGAGAAAATGAGTACTCCGCTGGGCGTTG (SEQ ID NO:7) Antisense 5′-CAACGCCCAGCGGAGTACTCATTTTCTCTGCGCCACC (SEQ ID NO:8) I108A, L111A, I114A Sense 5′-GCAATTGGCTCCGGGGCTGGCGGCGCCGGACTGGCCGAAG AAAACCACAC (SEQ ID NO:9) Antisense 5′-GTGTGGTTTTCTTCGGCCAGTCCGGCGCCGCCAGCCCCGG AGCCAATTGC (SEQ ID NO:10) L111A Sense 5′-GGGATTGGCGGCGCCGGACTGATCGAAG (SEQ ID NO:11) Antisense 5′-CTTCGATCAGTCCGGCGCCGCCAATCCC (SEQ ID NO:12) F133A Sense 5′-GATCAGCCCATTCGCGGTACCGTCAACGATTGTG (SEQ ID NO:13) Antisense 5′-CACAATCGTTGACGGTACCGCGAATGGGCTGATC (SEQ ID NO:14) I197A Sense 5′-GAGAAAGCCAGTACTCCGGCGGGCGTTGGTGG (SEQ ID NO:15) Antisense 5′-CCACCAACGCCCGCCGGAGTACTGGCTTTCTC (SEQ ID NO:16)

Example 3 Construct Preparation

[0093] 3A. E. coli Expression Constructs

[0094] A series of constructs are prepared to direct the expression of the engineered KAS sequences in E. coli.

[0095] A series of constructs are prepared to direct the expression of the various engineered KAS sequences in host plant cells.

[0096] The construct pCGN10440 contains the I1-8F mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0097] The construct pCGN10441 contains the I108L mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0098] The construct pCGN10442 contains the A193I mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0099] The construct pCGN10443 contains the I108F, A193I mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0100] The construct pCGN10444 contains the I108L, A1 931 mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0101] The construct pCGN10445 contains the A193M mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0102] The construct pCGN10446 contains the 1108F, A193M mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0103] The construct pCGN10447 contains the I108L, A193M mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0104] The construct pCGN10448 contains the LI l A mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0105] The construct pCGN10449 contains the F133A mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0106] The construct pCGN10450 contains the L111A, F133A mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0107] The construct pCGN10451 contains the I108A, L11A, I114A mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0108] The construct pCGN10452 contains the F133A, L197A mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0109] The construct pCGN10453 contains the I108A, L11A, I11 4A, F133A, L197A mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0110] The construct pCGN10454 contains the L197A mutant expressed from the pQE30 (Qiagen) vector for expression in a host E. coli cell.

[0111] 3B. Preparation of Plant Expression Constructs

[0112] A series of constructs are prepared to direct the expression of the engineered KAS sequences in plant host cells, both alone and in combination with additional sequences encoding proteins involved in fatty acid biosynthesis.

[0113] A plasmid containing the napin cassette derived from pCGN3223 (described in U.S. Pat. No. 5,639,790, the entirety of which is incorporated herein by reference) was modified to make it more useful for cloning large DNA fragments containing multiple restriction sites, and to allow the cloning of multiple napin fusion genes into plant binary transformation vectors. An adapter comprised of the self annealed oligonucleotide of sequence CGCGATTTAAATGGCGCGCCCTGCAGGCGGCCGCCTGCAGGGCGCGCCATTTAAAT (SEQ ID NO: ) was ligated into the cloning vector pBC SK+ (Stratagene) after digestion with the restriction endonuclease BssHII to construct vector pCGN7765. Plamids pCGN3223 and pCGN7765 were digested with Noti and ligated together. The resultant vector, pCGN7770, contains the pCGN7765 backbone with the napin seed specific expression cassette from pCGN3223.

[0114] A binary vector for plant transformation, pCGN5139, was constructed from pCGN1558 (McBride and Summerfelt, (1990) Plant Molecular Biology, 14:269-276). The polylinker of pCGN1558 was replaced as a HindIII/Asp718 fragment with a polylinker containing unique restriction endonuclease sites, AscI, PacI, XbaI, SwaI, BamHI, and NotI. The Asp718 and HindIII restriction endonuclease sites are retained in pCGN5139.

[0115] A binary vector, pCGN8642 was constructed to allow for the rapid cloning of various expression cassettes into the vector for use in plant transformation. The construct contains a multiple cloning region located between the right and left borders of the Agrobacterium transfer DNA. The construct also contains the Tn5 gene expressed from the 35S promoter between the multiple cloning site and the left border for selection of transformed plants on kanamycin.

[0116] A 354 bp BglII fragment containing the Cuphea hookeriana KASII-7 plastid targeting sequence (FIG. 14) (SEQ ID NO: ) was cloned into the BamHI site of the various pQE30 constructs containing the E. coli KASH (FabF) wild type or mutant KAS sequences. The resultant chimeric KAS II targeting sequence/FabF encoding sequence were cloned as HindIII/SalI fragments into filled-in SalI/XhoI sites of the napin expression cassette, pCGN7770. The resulting napin/KAS cassettes were cloned as NotI fragments into the NotI sites of various plant binary constructs as described below.

[0117] A napin cassette containing the coding sequence of the Cuphea hookeriana FatB2 protein (described in PCT Publication WO 98/46776, the entirety of which is incorporated herein by reference) was cloned as a NotI fragment into the NotI site of pCGN8642 to create pCGN 11000.

[0118] A napin cassette containing the coding sequence of the Gann FatA1 protein (described in PCT Publication WO 97/12047, the entirety of which is incorporated herein by reference) was cloned into the NotI site of pCGN8642 to create pCGN11003.

[0119] A napin cassette containing the native (wild-type) E. coli KAS II coding sequence was cloned into the NotI site of pCGN11003 to create pCGN11040.

[0120] A napin cassette containing the native (wild-type) E. coli KAS II coding sequence was cloned into the NotI site of pCGN11003 to create pCGN11040.

[0121] A napin cassette containing the native (wild-type) E. coli KAS II coding sequence was cloned into the NotI site of pCGN8642 to create pCGN 11041.

[0122] A napin cassette containing the native (wild-type) E. coli KAS II coding sequence was cloned into the NotI site of pCGN11000 to create pCGN11042.

[0123] A napin cassette containing the L111A KAS II mutant coding sequence was cloned into the NotI site of pCGN11003 to create pCGN11045.

[0124] A napin cassette containing the L111A KAS II mutant coding sequence was cloned into the NotI site of pCGN8642 to create pCGN11046.

[0125] A napin cassette containing the F133A KAS II mutant coding sequence was cloned into the NotI site of pCGN11003 to create pCGN11049.

[0126] A napin cassette containing the F133A KAS II mutant coding sequence was cloned into the NotI site of pCGN11003 to create pCGN11050.

[0127] A napin cassette containing the L111A, F133A KAS II double mutant coding sequence was cloned into the NotI site of pCGN11003 to create pCGN11053.

[0128] A napin cassette containing the L111A, F133A KAS II double mutant coding sequence was cloned into the NotI site of pCGN8642 to create pCGN11054.

[0129] A napin cassette containing the 1108A, L111A, I114A KAS II triple mutant coding sequence was cloned into the NotI site of pCGN11003 to create pCGN11057.

[0130] A napin cassette containing the I108A, L111A, I114A KAS II triple mutant coding sequence was cloned into the NotI site of pCGN8642 to create pCGN 11058.

[0131] A napin cassette containing the 1108A, L111A, I114A, F133A, L197A KAS II multiple mutant coding sequence was cloned into the NotI site of pCGN11003 to create pCGN11061.

[0132] A napin cassette containing the 1108A, L111A, I114A, F133A, L197A KAS IImulitple mutant coding sequence was cloned into the NotI site of pCGN8642 to create pCGN11062.

[0133] A napin cassette containing the I108F KAS II mutant coding sequence was cloned into the NotI site of pCGN11000 to create pCGN11065.

[0134] A napin cassette containing the I108F KAS II mutant coding sequence was cloned into the NotI site of pCGN8642 to create pCGN11066.

[0135] A napin cassette containing the 1108F, A193I KAS II double mutant coding sequence was cloned into the NotI site of pCGN11000 to create pCGN11069.

[0136] A napin cassette containing the I108F, A193I KAS II double mutant coding sequence was cloned into the NotI site of pCGN8642 to create pCGN11070.

[0137] A napin cassette containing the A193M KAS II mutant coding sequence was cloned into the NotI site of pCGN11000 to create pCGN11073.

[0138] A napin cassette containing the A193M KAS II mutant coding sequence was cloned into the NotI site of pCGN8642 to create pCGN11074.

Example 4 Analysis of Engineered KAS II Proteins Expression in E. coli

[0139]FIG. 7 shows the complete list of mutations that were generated in E.coli KAS II using the Stratagene Quick-Change™ site-directed mutagenesis kit, and confirmed by DNA sequencing. The mutant KAS II genes cloned behind an IPTG inducible T5 promoter (pQE30 vector, Qiagen) were transformed into E. coli strain M15/pREP4. The effect of the expression of these KAS II mutants on the fatty acid composition of E. coli is shown in FIG. 3. E. coli M15/pREP4 strains containing no vector (−Vec), vector without insert (+Vec), or vectors expression wild-type KAS I or II or single or multiple engineered forms of KASII were grown to mid-log phase in LB media at 30° C. Expression was induced for 2 hours with IPTG (0.75 mM), cells were harvested, lyophilzed, and the lipids were extracted into toluene and derivatized by sodium methoxide and analyzed for fatty acid content by GC FAME analysis as described in Dehesh, et al (1998) Plant J. 15:383-390.

[0140] The mutations prepared to increase the length of the end product fatty acids lead to the accumulation of abnormally long fatty acids in E.coli (FIG. 3). Wild-type E.coli membranes contain no stearic acid and barely detectable levels of 20:0 and 20:1. Whereas L197, F133A and L111A all resulted in further elongation of the normal membrane components 16:0, and 18:1 resulting in the accumulation of 4, 7 and 13% 18:0 respectively, and 1 to 3% 20:0 and 20:1. KAS II/L111A produced the highest level of 18:0 (13%) while KAS II/L111A-F133A accumulated the highest levels of 20:0 and 20:1 (2 and 4% respectively). Mutations I108A and I114A appeared to decrease the long chain fatty acid accumulation due to L111A and F133A.

[0141] The KAS II mutants prepared to shorten the maximum fatty acids were analyzed in vitro for the ability to utilize various chain length acyl-ACP substrates. Results of the in vitro assays (FIGS. 4, 5, and 6) demonstrates that the mutants I108F, I108L, A193M, and A193I have a reduced ability to utilize C8-ACP and longer substrates for condensation. However, these mutations are able to utilize C6-ACP substrates for elongation to produce C8 fatty acids. Furthermore, at least one mutation, A193M, had an increased ability to utilize C6-ACP substrates compared to the wild-type KAS for elongation.

[0142] The data showing the effect of mutations I108F, I108L, A193I and A193M (together or separately) on the enzymatic activity of KAS II are summarized in FIGS. 4, 5 and 6. FIG. 4 shows that mutations I108F, I108L and A193M all cause significant reduction in the activity of KAS II on 8:0-ACP as compared to 6:0-ACP (38, 31 and 12 fold reductions respectively), without significantly reducing the activity on 6:0-ACP. In other words they have effectively changed KAS II into an enzyme capable of making fatty acids up to a maximum of 8 carbons in length. Mutation A193I only causes a 1.8 fold decrease in activity on 8:0-ACP as compared to 6:0-ACP. FIG. 5 shows that the combined mutations at I108 and A193 have the effect of reducing the activity of KAS II on 6:0-ACP somewhat, but FIG. 6 shows that the combined effect was much greater effect on the activity with acylACPs 8:0 and longer (14:0). Consequently the double mutants are even more specific for the synthesis of 8 carbon fatty acids. The most specific is KAS II I108F/A193 KAS II which is 90X more active on 6:0-ACP than it is on 8:0-ACP suggesting that it is now an enzyme highly specific for the synthesis of fatty acids only up to 8 carbons in length.

Example 5 Structural Comparisons of a Plant Medium-Chain specific KAS with E. coli KAS II

[0143] To further characterize the structure-function relationships of KAS fatty acid binding pockets the modeled structure of a plant medium-chain (8:0, 10:0) specific KAS [Cuphea. pulcherrima, (C. pu) KASIV] (Dehesh et al. (1998) Plant J. 15:383-390) was compared with the crystal structure of E.coli KAS II. FIG. 8 shows that C. pu KAS I is predicted to share essentially the same folding pattetn as E.coli KAS II with the exception of a few loop regions, as might be expected given the structural similarity between KAS enzymes. Furthermore, Cpu KAS IV also has a similar structure (FIG. 9). The general structure for the KAS family of proteins follows the α-β-α-β-α folding pattern. Indeed at the amino acid sequence level, all but 7 of the 55 highly conserved residues among KAS enzymes are identical (87% identity). However there is only 60% identity in hydrophobic fatty acid binding pocket region with 8 of the 20 amino acids being different consistent with this region of the protein being responsible for the differences in the enzymes specificity. Furthermore the model shows no stearic hinderance in the formation of KASI and KASIV heterodimer (FIG. 10). In addition, amino acid sequence comparisons between plant, mammalian, bacterial

Example 6 Plant Transformation and Analysis

[0144] The expression constructs described in Example 3B above were used to transform Arabidopsis thaliana (Columbia) and/or Columbia mutants fab 1, fae1-1, and fae1-2.

[0145] Seeds from transformed Arabidopsis lines were analyzed for fatty acid composition and are provided in Table 2 below and shown in FIG. 13. Fatty acid methyl esters (FAME) extracted in hexane were resolved by gas chromatography (GC) on a Hewlett Packard model 6890 GC. TABLE 2 Fatty 18:1 18:1 Acid 12:0 14:0 16:0 16:1 18:0 C9 C11 18:2 18:3 20:0 11058-AT002-19 0.29 0.17 7.86 0.50 3.85 14.53 3.37 26.02 18.72 2.83 11062-AT002-8 0.12 0.00 5.30 0.23 2.49 10.47 1.34 21.55 25.97 2.75 AT002-44 0.17 0.00 8.53 0.26 3.35 15.65 1.21 29.06 17.22 2.06 11041-AT002-9 0.00 0.00 9.46 0.29 3.49 13.87 1.18 27.32 18.88 2.28 Fatty 20:1 20:1 Acid C11 C13 20:2 20:3 22:0 22:1 22:2 22:3 24:0 24:1 11058-AT002-19 11.61 3.71 1.39 0.67 0.41 1.71 0.33 0.33 0.90 0.81 11062-AT002-8 14.55 2.11 2.56 2.07 0.55 5.36 0.40 1.13 0.42 0.63 AT002-44 17.22 1.36 1.63 0.36 0.29 1.26 0.02 0.07 0.14 0.14 11041-AT002-9 17.52 1.43 1.69 0.48 0.30 1.46 0.00 0.00 0.18 0.16

[0146] T2 pooled seeds from transgenic Arabidopsis lines containing pCGN11041 (11041-AT002-9) expressing the native E. coli KAS II protein in the seed tissue demonstrated nearly the same fatty acid composition as the nontransformed control Arabidopsis plants (AT002-44).

[0147] T2 pooled seeds from transgenic Arabidopsis var Columbia containing the construct pCGN11058 demonstrated the ability to synthesize longer carbon chain fatty acids compared to the nontransformed control plants as well as transgenic plants containing the wild-type E. coli KAS II protein. Particular increases in the production of 18:1 c11, 20:1 c13, 24:0 and 24:1 are observed in transgenic plants containing pCGN11058. Increases of 18:1 c11, 20:1 c13, 24:0 and 24:1 of 2 to 3 fold are obtained compared to nontransformed control plants. The fact that these levels were not higher may be due to the fact that there are many enzymatic steps downstream from the condensation step catalyzed by KAS enzymes which affect the longer chain acylACPs produced incorporation into triglycerides.

[0148] T2 pooled seeds from transgenic Arabidopsis var Columbia containing the construct pCGN11062 also demonstrated the ability to synthesize longer chain fatty acids compared to nontransformed control plants and transgenic plants containing the wild-type E. coli KAS II protein construct. The T2 pooled seeds of 11062 transgenic lines were found to have a 3 to 4 fold increase in 22:1 as well as increased amounts of 20:2, 20:3 and 22:3, consistent with the presence of a KAS II protein being present in the plastid.

[0149] The above results demonstrate the ability to modify β-ketoacyl-ACP synthase sequences such that engineered β-ketoacyl-ACP synthases having altered substrate specificity may be produced. Such β-ketoacyl-ACP synthases may be expressed in host cells to provide a supply of the engineered β-ketoacyl-ACP synthase and to modify the existing pathway of fatty acid synthesis such that novel compositions of fatty acids are obtained. In particular, the engineered β-ketoacyl-ACP synthases may be expressed in the seeds of oilseed plants to provide a natural source of desirable TAG molecules.

[0150] All publications and patent applications mentioned in this specification are indicative of the level of skill of those skilled in the art to which this invention pertains. All publications and patent applications are herein incorporated by reference to the same extent as if each individual publication or patent application was specifically and individually indicated to be incorporated by reference.

[0151] Although the foregoing invention has been described in some detail by way of illustration and example for purposes of clarity of understanding, it will be obvious that certain changes and modifications may be practiced within the scope of the appended claims.

1 47 1 36 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer I108F Sense 1 gtgccgcaat tggatccggg tttggcggcc tcggac 36 2 36 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer I108F Antisense 2 gtccgaggcc gccaaacccg gatccaattg cggcac 36 3 42 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer I108L Sense 3 gtgccgcaat tggctccggg cttggaggcc tcggactgat cg 42 4 42 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer I108L Antisense 4 cgatcagtcc gaggcctcca agcccggagc caattgcggc ac 42 5 36 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer A193I Sense 5 gcaggtggcg ccgagaaaat cagtacgccg ctgggc 36 6 35 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer A193I Antisense 6 gcccagcggc gtactgattt tctcggcgcc acctg 35 7 37 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer A193M Sense 7 ggtggcgcag agaaaatgag tactccgctg ggcgttg 37 8 37 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer A193M Antisense 8 caacgcccag cggagtactc attttctctg cgccacc 37 9 50 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer I108A,L111A, I114A Sense 9 gcaattggct ccggggctgg cggcgccgga ctggccgaag aaaaccacac 50 10 50 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer I108A,L111A, I114A Antisense 10 gtgtggtttt cttcggccag tccggcgccg ccagccccgg agccaattgc 50 11 28 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer L111A Sense 11 gggattggcg gcgccggact gatcgaag 28 12 28 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer L111A Antisense 12 cttcgatcag tccggcgccg ccaatccc 28 13 34 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer F133A Sense 13 gatcagccca ttcgcggtac cgtcaacgat tgtg 34 14 34 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer F133A Antisense 14 cacaatcgtt gacggtaccg cgaatgggct gatc 34 15 32 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer L197A Sense 15 gagaaagcca gtactccggc gggcgttggt gg 32 16 32 DNA Artificial Sequence misc_feature ()..() Oligonucleotide Primer L197A Antisense 16 ccaccaacgc ccgccggagt actggctttc tc 32 17 56 DNA Artificial sequence misc_feature ()..() Self annealed oligonucleotide primer 17 cgcgatttaa atggcgcgcc ctgcaggcgg ccgcctgcag ggcgcgccat ttaaat 56 18 366 DNA Cuphea hookeriana 18 ctgagatctg tcgacatggc gaccgcttct cgcatggttg cgtccccttt ctgtacgtgg 60 ctcgtagctg catgcatgcc cacttcatcc gacaacgacc cacgttccct ttcccacaag 120 cggctccgcc tctcccgtcg ccggaggact ctctcctccc attgctccct ccgcggatcc 180 accttccaat gcctcgatcc ttgcaaccag caacgcttcc tcggggataa cggattcgct 240 tccctcttcg gatccaagcc tcttcgttca aatcgcggcc acctgaggct cggccgcact 300 tcccattccg gggaggtcat ggctgtggct atgcaacctg cacaggaagt ctccacaaga 360 tctgtc 366 19 431 PRT Arabidopsis thaliana 19 Ile Ser Ala Ser Ala Ser Thr Val Ser Ala Pro Lys Arg Glu Thr Asp 1 5 10 15 Pro Lys Lys Arg Val Val Ile Thr Gly Met Gly Leu Val Ser Val Cys 20 25 30 Gly Asn Asp Val Asp Ala Tyr Tyr Glu Lys Leu Leu Ser Gly Glu Ser 35 40 45 Gly Ile Ser Leu Ile Asp Arg Phe Asp Ala Ser Lys Phe Pro Thr Arg 50 55 60 Phe Gly Gly Gln Ile Arg Gly Phe Ser Ser Glu Gly Tyr Ile Asp Gly 65 70 75 80 Lys Asn Glu Arg Arg Leu Asp Asp Cys Leu Lys Tyr Cys Ile Val Ala 85 90 95 Gly Lys Lys Ala Leu Glu Ser Ala Asn Leu Gly Gly Asp Lys Leu Asn 100 105 110 Thr Ile Asp Lys Arg Lys Ala Gly Val Leu Val Gly Thr Gly Met Gly 115 120 125 Gly Leu Thr Val Phe Ser Glu Gly Val Gln Asn Leu Ile Glu Lys Gly 130 135 140 His Arg Arg Ile Ser Pro Phe Phe Ile Pro Tyr Ala Ile Thr Asn Met 145 150 155 160 Gly Ser Ala Leu Leu Ala Ile Asp Leu Gly Leu Met Gly Pro Asn Tyr 165 170 175 Ser Ile Ser Thr Ala Cys Ala Thr Ser Asn Tyr Cys Phe Tyr Ala Ala 180 185 190 Ala Asn His Asn His Arg Gly Glu Ala Asp Met Met Ile Ala Gly Gly 195 200 205 Thr Glu Ala Ala Ile Ile Pro Ile Gly Leu Gly Gly Phe Val Ala Cys 210 215 220 Arg Ala Leu Ser Gln Arg Asn Asp Asp Pro Gln Thr Ala Ser Arg Pro 225 230 235 240 Trp Asp Lys Ala Arg Asp Gly Phe Val Met Gly Glu Gly Ala Gly Val 245 250 255 Leu Val Met Glu Ser Leu Glu His Ala Met Lys Arg Gly Ala Pro Ile 260 265 270 Val Ala Glu Tyr Leu Gly Gly Ala Val Asn Cys Asp Ala His His Met 275 280 285 Thr Asp Pro Arg Ala Asp Gly Leu Gly Val Ser Ser Cys Ile Glu Arg 290 295 300 Cys Leu Glu Asp Ala Gly Val Ser Pro Glu Glu Val Asn Tyr Ile Asn 305 310 315 320 Ala His Ala Thr Ser Thr Leu Ala Gly Asp Leu Ala Glu Ile Asn Ala 325 330 335 Ile Lys Lys Val Phe Lys Ser Thr Ser Gly Ile Lys Ile Asn Ala Thr 340 345 350 Lys Ser Met Ile Gly His Cys Leu Gly Ala Ala Gly Gly Leu Glu Ala 355 360 365 Ile Ala Thr Val Lys Ala Ile Asn Thr Gly Trp Leu His Pro Ser Ile 370 375 380 Asn Gln Phe Asn Pro Glu Gln Ala Val Asp Phe Asp Thr Val Pro Asn 385 390 395 400 Glu Lys Lys Gln His Glu Val Asp Val Ala Ile Ser Asn Ser Phe Gly 405 410 415 Phe Gly Gly His Asn Ser Val Val Ala Phe Ser Ala Phe Lys Pro 420 425 430 20 429 PRT Brassica napus 20 Ala Ser Ser Ser Ala Val Ser Ala Pro Lys Arg Glu Thr Asp Pro Lys 1 5 10 15 Lys Arg Val Val Ile Thr Gly Met Gly Leu Val Ser Val Phe Gly Asn 20 25 30 Asp Val Asp Ala Tyr Tyr Glu Lys Leu Leu Ser Gly Glu Ser Gly Ile 35 40 45 Ser Leu Ile Asp Arg Phe Asp Ala Ser Lys Phe Pro Thr Arg Phe Gly 50 55 60 Gly Gln Ile Arg Gly Phe Ser Ser Glu Gly Tyr Ile Asp Gly Lys Asn 65 70 75 80 Glu Arg Arg Leu Asp Asp Cys Leu Lys Tyr Cys Ile Val Ala Gly Lys 85 90 95 Lys Ala Leu Glu Ser Ala Asn Leu Gly Gly Asp Lys Leu Asn Thr Ile 100 105 110 Asp Lys Gln Lys Ala Gly Val Leu Val Gly Thr Gly Met Gly Gly Leu 115 120 125 Thr Val Phe Ser Asp Gly Val Gln Ala Leu Ile Glu Lys Gly His Arg 130 135 140 Arg Ile Ser Pro Phe Phe Ile Pro Tyr Ala Ile Thr Asn Met Gly Ser 145 150 155 160 Ala Leu Leu Ala Ile Asp Leu Gly Leu Met Gly Pro Asn Tyr Ser Ile 165 170 175 Ser Thr Ala Cys Ala Thr Ser Asn Tyr Cys Phe Tyr Ala Ala Ala Asn 180 185 190 His Ile Arg Arg Gly Glu Ala Asp Met Met Ile Ala Gly Gly Thr Glu 195 200 205 Ala Ala Ile Ile Pro Ile Gly Leu Gly Gly Phe Val Ala Cys Arg Ala 210 215 220 Leu Ser Gln Arg Asn Asp Asp Pro Gln Thr Ala Ser Arg Pro Trp Asp 225 230 235 240 Lys Gln Arg Asp Gly Phe Val Met Gly Glu Gly Ala Gly Val Leu Val 245 250 255 Met Glu Ser Leu Glu His Ala Met Lys Arg Gly Ala Pro Ile Val Ala 260 265 270 Glu Tyr Leu Gly Gly Ala Val Asn Cys Asp Ala His His Met Thr Asp 275 280 285 Pro Arg Ala Asp Gly Leu Gly Val Ser Ser Cys Ile Glu Ser Cys Leu 290 295 300 Glu Asp Ala Gly Val Ser Pro Glu Glu Val Asn Tyr Ile Asn Ala His 305 310 315 320 Ala Thr Ser Thr Leu Ala Gly Asp Leu Ala Glu Ile Asn Ala Ile Lys 325 330 335 Lys Val Phe Lys Ser Thr Ser Gly Ile Lys Ile Asn Ala Thr Lys Ser 340 345 350 Met Ile Gly His Cys Leu Gly Ala Ala Gly Gly Leu Glu Ala Ile Ala 355 360 365 Thr Val Lys Ala Ile Asn Thr Gly Trp Leu His Pro Ser Ile Asn Gln 370 375 380 Phe Asn Pro Glu Pro Ala Val Asp Phe Asp Thr Val Ala Asn Glu Lys 385 390 395 400 Lys Gln His Glu Val Asn Val Ala Ile Ser Asn Ser Phe Gly Phe Gly 405 410 415 Gly His Asn Ser Val Val Ala Phe Ser Ala Phe Lys Pro 420 425 21 350 PRT Cuphea hookeriana 21 Ser Ser Thr Ala Val Ala Ala Ala Leu Glu Leu Val Asp Pro Pro Gly 1 5 10 15 Cys Arg Asn Ser Ala Arg Ala Asp Leu Gly Ala Asp Arg Leu Ser Lys 20 25 30 Ile Asp Lys Glu Arg Ala Gly Val Leu Val Gly Thr Gly Met Gly Gly 35 40 45 Leu Thr Val Phe Ser Asp Gly Val Gln Ser Leu Ile Glu Lys Gly His 50 55 60 Arg Lys Ile Thr Pro Phe Phe Ile Pro Tyr Ala Ile Thr Asn Met Gly 65 70 75 80 Ser Ala Leu Leu Ala Ile Glu Phe Gly Leu Met Gly Pro Asn Tyr Ser 85 90 95 Ile Ser Thr Ala Cys Ala Thr Ser Asn Tyr Cys Phe His Ala Ala Ala 100 105 110 Asn His Ile Arg Arg Gly Glu Ala Asp Leu Met Ile Ala Gly Gly Thr 115 120 125 Glu Ala Ala Ile Ile Pro Ile Gly Leu Gly Gly Phe Val Ala Cys Arg 130 135 140 Ala Leu Ser Gln Arg Asn Asp Asp Pro Gln Thr Ala Ser Arg Pro Trp 145 150 155 160 Asp Lys Asp Arg Asp Gly Phe Val Met Gly Glu Gly Ala Gly Val Leu 165 170 175 Val Met Glu Ser Leu Glu His Ala Met Arg Arg Gly Ala Pro Ile Ile 180 185 190 Ala Glu Tyr Leu Gly Gly Ala Ile Asn Cys Asp Ala Tyr His Met Thr 195 200 205 Asp Pro Arg Ala Asp Gly Leu Gly Val Ser Ser Cys Ile Glu Ser Ser 210 215 220 Leu Glu Asp Ala Gly Val Ser Pro Glu Glu Val Asn Tyr Ile Asn Ala 225 230 235 240 His Ala Thr Ser Thr Leu Ala Gly Asp Leu Ala Glu Ile Asn Ala Ile 245 250 255 Lys Lys Val Phe Lys Asn Thr Lys Asp Ile Lys Ile Asn Ala Thr Lys 260 265 270 Ser Met Ile Gly His Cys Leu Gly Ala Ser Gly Gly Leu Glu Ala Ile 275 280 285 Ala Thr Ile Lys Gly Ile Asn Thr Gly Trp Leu His Pro Ser Ile Asn 290 295 300 Gln Phe Asn Pro Glu Pro Ser Val Glu Phe Asp Thr Val Ala Asn Lys 305 310 315 320 Lys Gln Gln His Glu Val Asn Val Ala Ile Ser Asn Ser Phe Gly Phe 325 330 335 Gly Gly His Asn Ser Val Val Ala Phe Ser Ala Phe Lys Pro 340 345 350 22 441 PRT Cuphea hookeriana misc_feature (15)..(15) Xaa at position 15 is unknown. 22 Lys Leu Thr Leu Thr Lys Gly Asn Lys Ser Trp Ser Ser Thr Xaa Val 1 5 10 15 Ala Ala Ala Leu Glu Leu Val Asp Pro Pro Gly Cys Arg Asn Ser Ala 20 25 30 Arg Ala Gly Met Gly Leu Val Ser Val Phe Gly Ser Asp Val Asp Ser 35 40 45 Tyr Tyr Glu Lys Leu Leu Ser Gly Glu Ser Gly Ile Ser Leu Ile Asp 50 55 60 Arg Phe Asp Ala Ser Lys Phe Pro Thr Arg Phe Gly Gly Gln Ile Arg 65 70 75 80 Gly Phe Asn Ala Thr Gly Tyr Ile Asp Gly Lys Asn Asp Arg Arg Leu 85 90 95 Asp Asp Cys Leu Arg Tyr Cys Ile Val Ala Gly Lys Lys Ala Leu Glu 100 105 110 Asn Ser Asp Leu Gly Gly Glu Ser Leu Ser Lys Ile Asp Lys Glu Arg 115 120 125 Ala Gly Val Leu Val Gly Thr Gly Met Gly Gly Leu Thr Val Phe Ser 130 135 140 Asp Gly Val Gln Asn Leu Ile Glu Lys Gly His Arg Lys Ile Ser Pro 145 150 155 160 Phe Phe Ile Pro Tyr Ala Ile Thr Asn Met Gly Ser Ala Leu Leu Ala 165 170 175 Ile Asp Leu Gly Leu Met Gly Pro Asn Tyr Ser Ile Ser Thr Ala Cys 180 185 190 Ala Thr Ser Asn Tyr Cys Phe Tyr Ala Ala Ala Asn His Ile Arg Arg 195 200 205 Gly Glu Ala Asp Leu Met Ile Ala Gly Gly Thr Glu Ala Ala Ile Ile 210 215 220 Pro Ile Gly Leu Gly Gly Phe Val Ala Cys Arg Ala Leu Ser Gln Arg 225 230 235 240 Asn Asp Asp Pro Gln Thr Ala Ser Arg Pro Trp Asp Lys Asp Arg Asp 245 250 255 Gly Phe Val Met Gly Glu Gly Ala Gly Val Leu Val Met Glu Ser Leu 260 265 270 Glu His Ala Met Lys Arg Gly Ala Pro Ile Ile Ala Glu Tyr Leu Gly 275 280 285 Gly Ala Val Asn Cys Asp Ala Tyr His Met Thr Asp Pro Arg Ala Asp 290 295 300 Gly Leu Gly Val Ser Ser Cys Ile Glu Ser Ser Leu Glu Asp Ala Gly 305 310 315 320 Val Ser Pro Glu Glu Val Asn Tyr Ile Asn Ala His Ala Thr Ser Thr 325 330 335 Leu Ala Gly Asp Leu Ala Glu Ile Asn Ala Ile Lys Lys Val Phe Lys 340 345 350 Asn Thr Lys Glu Ile Thr Ile Asn Ala Thr Lys Ser Met Ile Gly His 355 360 365 Cys Leu Gly Ala Ser Gly Gly Leu Glu Ala Ile Ala Thr Ile Lys Gly 370 375 380 Ile Thr Thr Gly Trp Leu His Pro Ser Ile Asn Gln Phe Asn Pro Glu 385 390 395 400 Pro Ser Val Glu Phe Asp Thr Val Ala Asn Lys Lys Gln Gln His Glu 405 410 415 Val Asn Val Ala Ile Ser Asn Ser Phe Gly Phe Gly Gly His Asn Ser 420 425 430 Val Val Ala Phe Ser Ala Phe Lys Pro 435 440 23 430 PRT Cuphea pullcherima 23 Arg Ala Ala Ser Pro Thr Val Ser Ala Pro Lys Arg Glu Thr Asp Pro 1 5 10 15 Lys Lys Arg Val Val Ile Thr Gly Met Gly Leu Val Ser Val Phe Gly 20 25 30 Ser Asp Val Asp Ala Tyr Tyr Asp Lys Leu Leu Ser Gly Glu Ser Gly 35 40 45 Ile Gly Pro Ile Asp Arg Phe Asp Ala Ser Lys Phe Pro Thr Arg Phe 50 55 60 Gly Gly Gln Ile Arg Gly Phe Asn Ser Met Gly Tyr Ile Asp Gly Lys 65 70 75 80 Asn Asp Arg Arg Leu Asp Asp Cys Leu Arg Tyr Cys Ile Val Ala Gly 85 90 95 Lys Lys Ser Leu Glu Asp Ala Asp Leu Gly Ala Asp Arg Leu Ser Lys 100 105 110 Ile Asp Lys Glu Arg Ala Gly Val Leu Val Gly Thr Gly Met Gly Gly 115 120 125 Leu Thr Val Phe Ser Asp Gly Val Gln Ser Leu Ile Glu Lys Gly His 130 135 140 Arg Lys Ile Thr Pro Phe Phe Ile Pro Tyr Ala Ile Thr Asn Met Gly 145 150 155 160 Ser Ala Leu Leu Ala Ile Glu Leu Gly Leu Met Gly Pro Asn Tyr Ser 165 170 175 Ile Ser Thr Ala Cys Ala Thr Ser Asn Tyr Cys Phe His Ala Ala Ala 180 185 190 Asn His Ile Arg Arg Gly Glu Ala Asp Leu Met Ile Ala Gly Gly Thr 195 200 205 Glu Ala Ala Ile Ile Pro Ile Gly Leu Gly Gly Phe Val Ala Cys Arg 210 215 220 Ala Leu Ser Gln Arg Asn Asp Asp Pro Gln Thr Ala Ser Arg Pro Trp 225 230 235 240 Asp Lys Asp Arg Asp Gly Phe Val Met Gly Glu Gly Ala Gly Val Leu 245 250 255 Val Leu Glu Ser Leu Glu His Ala Met Lys Arg Gly Ala Pro Ile Ile 260 265 270 Ala Glu Tyr Leu Gly Gly Ala Ile Asn Cys Asp Ala Tyr His Met Thr 275 280 285 Asp Pro Arg Ala Asp Gly Leu Gly Val Ser Ser Cys Ile Glu Ser Ser 290 295 300 Leu Glu Asp Ala Gly Val Ser Pro Glu Glu Val Asn Tyr Ile Asn Ala 305 310 315 320 His Ala Thr Ser Thr Leu Ala Gly Asp Leu Ala Glu Ile Asn Ala Ile 325 330 335 Lys Lys Val Phe Lys Asn Thr Lys Asp Ile Lys Ile Asn Ala Thr Lys 340 345 350 Ser Met Ile Gly His Cys Leu Gly Ala Ser Gly Gly Leu Glu Ala Ile 355 360 365 Ala Thr Ile Lys Gly Ile Asn Thr Gly Trp Leu His Pro Ser Ile Asn 370 375 380 Gln Phe Asn Pro Glu Pro Ser Val Glu Phe Asp Thr Val Ala Asn Lys 385 390 395 400 Lys Gln Gln His Glu Val Asn Val Ala Ile Ser Asn Ser Phe Gly Phe 405 410 415 Gly Gly His Asn Ser Val Val Ala Phe Ser Ala Phe Lys Pro 420 425 430 24 428 PRT Cuphea pullcherima 24 Arg Ala Ala Thr Ala Ser Ala Pro Lys Arg Glu Ser Asp Pro Lys Lys 1 5 10 15 Arg Val Val Ile Thr Gly Met Gly Leu Val Ser Val Phe Gly Ser Asp 20 25 30 Val Asp Ala Tyr Tyr Asp Lys Leu Leu Ser Gly Glu Ser Gly Ile Ser 35 40 45 Leu Ile Asp Arg Phe Asp Ala Ser Lys Phe Pro Thr Arg Phe Ala Gly 50 55 60 Gln Ile Arg Gly Phe Asn Ala Thr Gly Tyr Ile Asp Gly Lys Asn Asp 65 70 75 80 Arg Arg Leu Asp Asp Cys Leu Arg Tyr Cys Ile Val Ala Gly Lys Lys 85 90 95 Ala Leu Glu Asp Ala Asp Leu Ala Gly Gln Ser Leu Ser Lys Ile Asp 100 105 110 Lys Glu Arg Ala Gly Val Leu Val Gly Thr Gly Met Gly Gly Leu Thr 115 120 125 Val Phe Ser Asp Gly Val Gln Asn Leu Ile Glu Lys Gly His Arg Lys 130 135 140 Ile Ser Pro Phe Phe Ile Pro Tyr Ala Ile Thr Asn Met Gly Ser Ala 145 150 155 160 Leu Leu Ala Ile Asp Leu Gly Leu Met Gly Pro Asn Tyr Ser Ile Ser 165 170 175 Thr Ala Cys Ala Thr Ser Asn Tyr Cys Phe Tyr Ala Ala Ala Asn His 180 185 190 Ile Arg Arg Gly Glu Ala Asp Leu Met Ile Ala Gly Gly Thr Glu Ala 195 200 205 Ala Val Ile Pro Ile Gly Leu Gly Gly Phe Val Ala Cys Arg Ala Leu 210 215 220 Ser Gln Arg Asn Asp Asp Pro Gln Thr Ala Ser Arg Pro Trp Asp Lys 225 230 235 240 Asp Arg Asp Gly Phe Val Met Gly Glu Gly Ala Gly Val Leu Val Met 245 250 255 Glu Ser Leu Glu His Ala Met Lys Arg Gly Ala Pro Ile Ile Ala Glu 260 265 270 Tyr Leu Gly Gly Ala Val Asn Cys Asp Ala Tyr His Met Thr Asp Pro 275 280 285 Arg Ala Asp Gly Leu Gly Val Ser Ser Cys Ile Glu Ser Ser Leu Glu 290 295 300 Asp Ala Gly Val Ser Pro Glu Glu Val Asn Tyr Ile Asn Ala His Ala 305 310 315 320 Thr Ser Thr Leu Ala Gly Asp Leu Ala Glu Ile Asn Ala Ile Lys Lys 325 330 335 Val Phe Lys Asn Thr Lys Glu Ile Lys Ile Asn Ala Thr Lys Ser Met 340 345 350 Ile Gly His Cys Leu Gly Ala Ser Gly Gly Leu Glu Ala Ile Ala Thr 355 360 365 Ile Lys Gly Ile Thr Thr Gly Trp Leu His Pro Ser Ile Asn Gln Phe 370 375 380 Asn Pro Glu Pro Ser Val Asp Phe Asn Thr Val Ala Asn Lys Lys Gln 385 390 395 400 Gln His Glu Val Asn Val Ala Ile Ser Asn Ser Phe Gly Phe Gly Gly 405 410 415 His Asn Ser Val Val Ala Phe Ser Ala Phe Lys Pro 420 425 25 427 PRT Hordeum vulgare 25 Thr Ser Ala Ala Pro Gln Arg Glu Thr Asp Pro Arg Lys Arg Val Val 1 5 10 15 Ile Thr Gly Met Gly Leu Ala Ser Val Phe Gly Ser Asp Val Asp Thr 20 25 30 Phe Tyr Asp Arg Leu Leu Ala Gly Glu Ser Gly Val Gly Pro Ile Asp 35 40 45 Arg Phe Asp Ala Ser Ser Phe Pro Thr Arg Phe Ala Gly Gln Ile Arg 50 55 60 Gly Phe Ser Ser Glu Gly Tyr Ile Asp Gly Lys Asn Asp Arg Arg Leu 65 70 75 80 Asp Asp Cys Ile Arg Tyr Cys Ile Leu Ser Gly Lys Lys Ala Leu Glu 85 90 95 Ser Ala Gly Leu Gly Ala Gly Ser Asp Ala His Val Lys Leu Asp Val 100 105 110 Gly Arg Ala Gly Val Leu Val Gly Thr Gly Met Gly Gly Leu Ser Val 115 120 125 Phe Ser Asp Gly Val Gln Asn Leu Ile Glu Lys Gly Tyr Arg Lys Ile 130 135 140 Ser Pro Phe Phe Ile Pro Tyr Ala Ile Thr Asn Met Gly Ser Ala Leu 145 150 155 160 Leu Ala Ile Asp Val Gly Phe Met Gly Pro Asn Tyr Ser Ile Ser Thr 165 170 175 Ala Cys Ala Thr Ser Asn Tyr Cys Phe Tyr Ala Ala Ala Asn His Ile 180 185 190 Arg Arg Gly Glu Ala Asp Ile Ile Val Ala Gly Gly Thr Glu Ala Ala 195 200 205 Ile Ile Pro Ile Gly Leu Gly Gly Phe Val Ala Cys Arg Ala Leu Ser 210 215 220 Gln Arg Asn Asp Asp Pro Ile Thr Ala Cys Arg Pro Trp Asp Lys Glu 225 230 235 240 Arg Asp Gly Phe Val Met Gly Glu Gly Ala Gly Val Leu Val Met Glu 245 250 255 Ser Leu Glu His Ala Met Lys Arg Asp Ala Pro Ile Ile Ala Glu Tyr 260 265 270 Leu Gly Gly Ala Val Asn Cys Asp Ala Tyr His Met Thr Asp Pro Arg 275 280 285 Ala Asp Gly Leu Gly Val Ser Ser Cys Ile Thr Met Ser Leu Arg Asp 290 295 300 Ala Gly Val Ala Pro Glu Glu Val Asn Tyr Ile Asn Ala His Ala Thr 305 310 315 320 Ser Thr Leu Ala Gly Asp Leu Ala Glu Val Arg Ala Ile Lys Gln Val 325 330 335 Phe Lys Asn Pro Ser Glu Ile Lys Ile Asn Ser Thr Lys Ser Met Ile 340 345 350 Gly His Cys Leu Gly Ala Ala Gly Gly Leu Glu Ala Ile Ala Thr Ile 355 360 365 Lys Ser Ile Thr Thr Gly Trp Val His Pro Thr Ile Asn Gln Phe Asn 370 375 380 Pro Glu Pro Glu Val Asp Phe Asp Thr Val Ala Asn Glu Lys Lys Gln 385 390 395 400 His Glu Val Asn Val Gly Ile Ser Asn Ser Phe Gly Phe Gly Gly His 405 410 415 Asn Ser Val Val Val Phe Ala Pro Phe Lys Pro 420 425 26 428 PRT Ricinus communis 26 Asn Asn Asn Thr Thr Ile Ser Ala Pro Lys Arg Glu Lys Asp Pro Arg 1 5 10 15 Lys Arg Val Val Ile Thr Gly Thr Gly Leu Val Ser Val Phe Gly Asn 20 25 30 Asp Val Asp Thr Tyr Tyr Asp Lys Leu Leu Ala Gly Glu Ser Gly Ile 35 40 45 Gly Leu Ile Asp Arg Phe Asp Ala Ser Lys Phe Pro Thr Arg Phe Gly 50 55 60 Gly Gln Ile Arg Gly Phe Asn Ser Gln Gly Tyr Ile Asp Gly Lys Asn 65 70 75 80 Asp Arg Arg Leu Asp Asp Cys Leu Arg Tyr Cys Ile Val Ala Gly Lys 85 90 95 Lys Ala Leu Glu His Ala Asp Leu Gly Gly Asp Lys Leu Ser Lys Ile 100 105 110 Asp Lys Glu Arg Ala Gly Val Leu Val Gly Thr Gly Met Gly Gly Leu 115 120 125 Thr Val Phe Ser Asp Gly Val Gln Ala Leu Ile Glu Lys Gly His Arg 130 135 140 Lys Ile Thr Pro Phe Phe Ile Pro Tyr Ala Ile Thr Asn Met Gly Ser 145 150 155 160 Ala Leu Leu Ala Ile Glu Leu Gly Leu Met Gly Pro Asn Tyr Ser Ile 165 170 175 Ser Thr Ala Cys Ala Thr Ser Asn Tyr Cys Phe Tyr Ala Ala Ala Asn 180 185 190 His Ile Arg Arg Gly Glu Ala Glu Leu Met Ile Ala Gly Gly Thr Glu 195 200 205 Ala Ala Ile Ile Pro Ile Gly Leu Gly Gly Phe Val Ala Cys Arg Ala 210 215 220 Leu Ser Gln Arg Asn Asp Asp Pro Gln Thr Ala Ser Arg Pro Trp Asp 225 230 235 240 Lys Asp Arg Asp Gly Phe Val Met Gly Glu Gly Ala Gly Val Leu Val 245 250 255 Met Glu Ser Leu Glu His Ala Met Lys Arg Gly Ala Pro Ile Ile Ala 260 265 270 Glu Tyr Leu Gly Gly Ala Val Asn Cys Asp Ala Tyr His Met Thr Asp 275 280 285 Pro Arg Ala Asp Gly Leu Gly Val Ser Ser Cys Ile Glu Arg Ser Leu 290 295 300 Glu Asp Ala Gly Val Ser Pro Glu Glu Val Asn Tyr Ile Asn Ala His 305 310 315 320 Ala Thr Ser Thr Leu Ala Gly Asp Leu Ala Glu Ile Asn Ala Ile Lys 325 330 335 Lys Val Phe Lys Asn Thr Ser Asp Ile Lys Ile Asn Ala Thr Lys Ser 340 345 350 Met Ile Gly His Cys Leu Gly Ala Ala Gly Gly Leu Glu Ala Ile Ala 355 360 365 Cys Val Lys Ala Ile Thr Thr Gly Trp Leu His Pro Thr Ile Asn Gln 370 375 380 Phe Asn Pro Glu Pro Ser Val Glu Phe Asp Thr Val Ala Asn Lys Lys 385 390 395 400 Gln Gln His Glu Val Asn Val Ala Ile Ser Asn Ser Phe Gly Phe Gly 405 410 415 Gly His Asn Ser Val Val Ala Phe Ser Ala Phe Lys 420 425 27 420 PRT Capsicum chinense 27 Lys Arg Glu Thr Asp Pro Lys Lys Arg Ile Val Ile Thr Gly Met Gly 1 5 10 15 Leu Val Ser Val Phe Gly Ser Asp Ile Asp Asn Phe Tyr Asn Lys Leu 20 25 30 Leu Glu Gly Gln Ser Gly Ile Ser Leu Ile Asp Arg Phe Asp Ala Ser 35 40 45 Ser Tyr Thr Val Arg Phe Ala Gly Gln Ile Arg Asp Phe Ser Ser Glu 50 55 60 Gly Tyr Ile Asp Gly Lys Asn Asp Arg Arg Leu Asp Asp Cys Trp Arg 65 70 75 80 Tyr Cys Leu Val Ala Gly Lys Arg Ala Leu Glu Asp Ala Asn Leu Gly 85 90 95 Gln Gln Val Leu Asp Thr Met Asp Lys Thr Arg Ile Gly Val Leu Val 100 105 110 Gly Ser Ser Met Gly Gly Ser Lys Val Phe Ala Asp Ala Val Glu Ala 115 120 125 Leu Val Gln Arg Gly Tyr Lys Lys Ile Asn Pro Phe Phe Ile Pro Tyr 130 135 140 Ser Ile Thr Asn Met Gly Ser Ala Leu Leu Ala Ile Asp Thr Gly Leu 145 150 155 160 Met Gly Pro Thr Tyr Ser Ile Ser Thr Ala Cys Ala Thr Ala Asn Tyr 165 170 175 Cys Phe Tyr Ala Ser Ala Asn His Ile Arg Arg Gly Glu Ala Asp Ile 180 185 190 Met Val Ala Gly Gly Thr Asp Ala Phe Ile Ser Ala Ile Gly Val Gly 195 200 205 Gly Leu Ile Ala Cys Arg Ala Leu Ser Gln Arg Asn Asp Glu Tyr Glu 210 215 220 Lys Ala Ser Arg Pro Trp Asp Arg Asn Arg Asp Gly Phe Val Ile Gly 225 230 235 240 Glu Gly Ser Gly Val Leu Val Met Glu Asn Leu Glu His Ala Leu Lys 245 250 255 Arg Gly Ala Pro Ile Ile Ala Glu Tyr Leu Gly Gly Ala Ile Thr Cys 260 265 270 Asp Ala His His Ile Thr Asp Pro Arg Ala Asp Gly Leu Gly Val Ser 275 280 285 Ser Cys Ile Val Met Ser Leu Val Asp Ala Gly Val Ser Pro Glu Glu 290 295 300 Val Asn Tyr Ile Asn Ala His Ala Thr Ser Thr Leu Ala Gly Asp Leu 305 310 315 320 Ala Glu Val Asn Ala Ile Lys Lys Val Phe Lys Asp Thr Ser Glu Ile 325 330 335 Lys Met Asn Gly Thr Lys Ser Met Ile Gly His Gly Leu Gly Ala Ser 340 345 350 Gly Gly Leu Glu Ala Ile Ala Thr Ile Lys Ala Ile Thr Thr Gly Trp 355 360 365 Leu His Pro Thr Ile Asn Gln Tyr Asp Leu Glu Pro Gln Val Thr Ile 370 375 380 Asp Thr Val Pro Asn Val Lys Lys Gln His Glu Val Asn Val Gly Ile 385 390 395 400 Ser Asn Ser Phe Gly Phe Gly Gly His Asn Ser Val Val Val Phe Ala 405 410 415 Pro Tyr Lys Pro 420 28 420 PRT Cuphea hookeriana 28 Lys Lys Lys Pro Ser Ile Lys Gln Arg Arg Val Val Val Thr Gly Met 1 5 10 15 Gly Val Val Thr Pro Leu Gly His Asp Pro Asp Val Phe Tyr Asn Asn 20 25 30 Leu Leu Asp Gly Thr Ser Gly Ile Ser Glu Ile Glu Thr Phe Asp Cys 35 40 45 Ala Gln Phe Pro Thr Arg Ile Ala Gly Glu Ile Lys Ser Phe Ser Thr 50 55 60 Asp Gly Trp Val Ala Pro Lys Leu Ser Lys Arg Met Asp Lys Phe Met 65 70 75 80 Leu Tyr Met Leu Thr Ala Gly Lys Lys Ala Leu Thr Asn Gly Gly Ile 85 90 95 Thr Glu Asp Val Met Lys Glu Leu Asp Lys Arg Lys Cys Gly Val Leu 100 105 110 Ile Gly Ser Ala Met Gly Gly Met Lys Val Phe Asn Asp Ala Ile Glu 115 120 125 Ala Leu Arg Ile Ser Tyr Lys Lys Met Asn Pro Phe Cys Val Pro Phe 130 135 140 Ala Thr Thr Asn Met Gly Ser Ala Met Leu Ala Met Asp Leu Gly Trp 145 150 155 160 Met Gly Pro Asn Tyr Ser Ile Ser Thr Ala Cys Ala Thr Ser Asn Phe 165 170 175 Cys Ile Leu Asn Ala Ala Asn His Ile Ile Arg Gly Glu Ala Asp Val 180 185 190 Met Leu Cys Gly Gly Ser Asp Ala Val Ile Ile Pro Ile Gly Met Gly 195 200 205 Gly Phe Val Ala Cys Arg Ala Leu Ser Gln Arg Asn Ala Asp Pro Thr 210 215 220 Lys Ala Ser Arg Pro Trp Asp Ser Asn Arg Asp Gly Phe Val Met Gly 225 230 235 240 Glu Gly Ala Gly Val Leu Leu Leu Glu Glu Leu Glu His Ala Lys Lys 245 250 255 Arg Gly Ala Thr Ile Tyr Ala Glu Phe Leu Gly Gly Ser Phe Thr Cys 260 265 270 Asp Ala Tyr His Met Thr Glu Pro His Pro Asp Gly Ala Gly Val Ile 275 280 285 Leu Cys Ile Glu Lys Ala Leu Ala Gln Ser Gly Val Ser Arg Glu Asp 290 295 300 Val Asn Tyr Ile Asn Ala His Ala Thr Ser Thr Pro Ala Gly Asp Ile 305 310 315 320 Lys Glu Tyr Gln Ala Leu Ile His Cys Phe Gly Gln Asn Asn Glu Leu 325 330 335 Lys Val Asn Ser Thr Lys Ser Met Ile Gly His Leu Leu Gly Ala Ala 340 345 350 Gly Gly Val Glu Ala Val Ser Val Val Gln Ala Ile Arg Thr Gly Trp 355 360 365 Ile His Pro Asn Ile Asn Leu Glu Asn Pro Asp Glu Gly Val Asp Thr 370 375 380 Lys Leu Leu Val Gly Pro Lys Lys Glu Arg Leu Asn Ile Lys Val Gly 385 390 395 400 Leu Ser Asn Ser Phe Gly Phe Gly Gly His Asn Ser Ser Ile Leu Phe 405 410 415 Ala Pro Tyr Asn 420 29 420 PRT Cuphea hookeriana 29 Asn Lys Lys Pro Ala Thr Lys Gln Arg Arg Val Val Val Thr Gly Met 1 5 10 15 Gly Val Val Thr Pro Leu Gly His Asp Pro Asp Val Tyr Tyr Asn Asn 20 25 30 Leu Leu Asp Gly Ile Ser Gly Ile Ser Glu Ile Glu Asn Phe Asp Cys 35 40 45 Ser Gln Phe Pro Thr Arg Ile Ala Gly Glu Ile Lys Ser Phe Ser Thr 50 55 60 Asp Gly Trp Val Ala Pro Lys Phe Ser Glu Arg Met Asp Lys Phe Met 65 70 75 80 Leu Tyr Met Leu Thr Ala Gly Lys Lys Ala Leu Ala Asp Gly Gly Ile 85 90 95 Thr Glu Asp Ala Met Lys Glu Leu Asn Lys Arg Lys Cys Gly Val Leu 100 105 110 Ile Gly Ser Gly Leu Gly Gly Met Lys Val Phe Ser Asp Ser Ile Glu 115 120 125 Ala Leu Arg Thr Ser Tyr Lys Lys Ile Ser Pro Phe Cys Val Pro Phe 130 135 140 Ser Thr Thr Asn Met Gly Ser Ala Ile Leu Ala Met Asp Leu Gly Trp 145 150 155 160 Met Gly Pro Asn Tyr Ser Ile Ser Thr Ala Cys Ala Thr Ser Asn Phe 165 170 175 Cys Ile Leu Asn Ala Ala Asn His Ile Ile Lys Gly Glu Ala Asp Met 180 185 190 Met Leu Cys Gly Gly Ser Asp Ala Ala Val Leu Pro Val Gly Leu Gly 195 200 205 Gly Phe Val Ala Cys Arg Ala Leu Ser Gln Arg Asn Asn Asp Pro Thr 210 215 220 Lys Ala Ser Arg Pro Trp Asp Ser Asn Arg Asp Gly Phe Val Met Gly 225 230 235 240 Glu Gly Ala Gly Val Leu Leu Leu Glu Glu Leu Glu His Ala Lys Lys 245 250 255 Arg Gly Ala Thr Ile Tyr Ala Glu Phe Leu Gly Gly Ser Phe Thr Cys 260 265 270 Asp Ala Tyr His Met Thr Glu Pro His Pro Glu Gly Ala Gly Val Ile 275 280 285 Leu Cys Ile Glu Lys Ala Leu Ala Gln Ser Gly Val Ser Arg Glu Asp 290 295 300 Val Asn Tyr Ile Asn Ala His Ala Thr Ser Thr Pro Ala Gly Asp Ile 305 310 315 320 Lys Glu Tyr Gln Ala Leu Ala His Cys Phe Gly Gln Asn Ser Glu Leu 325 330 335 Arg Val Asn Ser Thr Lys Ser Met Ile Gly His Leu Leu Gly Gly Ala 340 345 350 Gly Gly Val Glu Ala Val Ala Val Val Gln Ala Ile Arg Thr Gly Trp 355 360 365 Ile His Pro Asn Ile Asn Leu Glu Asp Pro Asp Glu Gly Val Asp Ala 370 375 380 Lys Leu Leu Val Gly Pro Lys Lys Glu Lys Leu Lys Val Lys Val Gly 385 390 395 400 Leu Ser Asn Ser Phe Gly Phe Gly Gly His Asn Ser Ser Ile Leu Phe 405 410 415 Ala Pro Cys Asn 420 30 420 PRT Cuphea pullcherima 30 Lys Lys Lys Pro Ser Ile Lys Gln Arg Arg Val Val Val Thr Gly Met 1 5 10 15 Gly Val Val Thr Pro Leu Gly His Asp Pro Asp Val Phe Tyr Asn Asn 20 25 30 Leu Leu Asp Gly Thr Ser Gly Ile Ser Glu Ile Glu Thr Phe Asp Cys 35 40 45 Ala Gln Phe Pro Thr Arg Ile Ala Gly Glu Ile Lys Ser Phe Ser Thr 50 55 60 Asp Gly Trp Val Ala Pro Lys Leu Ser Lys Arg Met Asp Lys Phe Met 65 70 75 80 Leu Tyr Met Leu Thr Ala Gly Lys Lys Ala Leu Thr Asp Gly Gly Ile 85 90 95 Thr Glu Asp Val Met Lys Glu Leu Asp Lys Arg Lys Cys Gly Val Leu 100 105 110 Ile Gly Ser Ala Met Gly Gly Met Lys Val Phe Asn Asp Ala Ile Glu 115 120 125 Ala Leu Arg Ile Ser Tyr Lys Lys Met Asn Pro Phe Cys Val Pro Phe 130 135 140 Ala Thr Thr Asn Met Gly Ser Ala Met Leu Ala Met Asp Leu Gly Trp 145 150 155 160 Met Gly Pro Asn Tyr Ser Ile Ser Thr Ala Cys Ala Thr Ser Asn Phe 165 170 175 Cys Ile Met Asn Ala Ala Asn His Ile Ile Arg Gly Glu Ala Asp Val 180 185 190 Met Leu Cys Gly Gly Ser Asp Ala Val Ile Ile Pro Ile Gly Met Gly 195 200 205 Gly Phe Val Ala Cys Arg Ala Leu Ser Gln Arg Asn Ser Asp Pro Thr 210 215 220 Lys Ala Ser Arg Pro Trp Asp Ser Asn Arg Asp Gly Phe Val Met Gly 225 230 235 240 Glu Gly Ala Gly Val Leu Leu Leu Glu Glu Leu Glu His Ala Lys Lys 245 250 255 Arg Gly Ala Thr Ile Tyr Ala Glu Phe Leu Gly Gly Ser Phe Thr Cys 260 265 270 Asp Ala Tyr His Met Thr Glu Pro His Pro Asp Gly Ala Gly Val Ile 275 280 285 Leu Cys Ile Glu Lys Ala Leu Ala Gln Ser Gly Val Ser Arg Glu Asp 290 295 300 Val Asn Tyr Ile Asn Ala His Ala Thr Ser Thr Pro Ala Gly Asp Ile 305 310 315 320 Lys Glu Tyr Gln Ala Leu Ile His Cys Phe Gly Gln Asn Arg Glu Leu 325 330 335 Lys Val Asn Ser Thr Lys Ser Met Ile Gly His Leu Leu Gly Ala Ala 340 345 350 Gly Gly Val Glu Ala Val Ser Val Val Gln Ala Ile Arg Thr Gly Trp 355 360 365 Ile His Pro Asn Ile Asn Leu Glu Asn Pro Asp Glu Gly Val Asp Thr 370 375 380 Lys Leu Leu Val Gly Pro Lys Lys Glu Arg Leu Asn Val Lys Val Gly 385 390 395 400 Leu Ser Asn Ser Phe Gly Phe Gly Gly His Asn Ser Ser Ile Leu Phe 405 410 415 Ala Pro Tyr Ile 420 31 421 PRT Cuphea wrightii 31 Lys Lys Lys Pro Val Ile Lys Gln Arg Arg Val Val Val Thr Gly Met 1 5 10 15 Gly Val Val Thr Pro Leu Gly His Glu Pro Asp Val Phe Tyr Asn Asn 20 25 30 Leu Leu Asp Gly Val Ser Gly Ile Ser Glu Ile Glu Thr Phe Asp Cys 35 40 45 Thr Gln Phe Pro Thr Arg Ile Ala Gly Glu Ile Lys Ser Phe Ser Thr 50 55 60 Asp Gly Trp Val Ala Pro Lys Leu Ser Lys Arg Met Asp Lys Phe Met 65 70 75 80 Leu Tyr Leu Leu Thr Ala Gly Lys Lys Ala Leu Ala Asp Gly Gly Ile 85 90 95 Thr Asp Glu Val Met Lys Glu Leu Asp Lys Arg Lys Cys Gly Val Leu 100 105 110 Ile Gly Ser Gly Met Gly Gly Met Lys Val Phe Asn Asp Ala Ile Glu 115 120 125 Ala Leu Arg Val Ser Tyr Lys Lys Met Asn Pro Phe Cys Val Pro Phe 130 135 140 Ala Thr Thr Asn Met Gly Ser Ala Met Leu Ala Met Asp Leu Gly Trp 145 150 155 160 Met Gly Pro Asn Tyr Ser Ile Ser Thr Ala Cys Ala Thr Ser Asn Phe 165 170 175 Cys Ile Leu Asn Ala Ala Asn His Ile Ile Arg Gly Glu Ala Asp Met 180 185 190 Met Leu Cys Gly Gly Ser Asp Ala Val Ile Ile Pro Ile Gly Leu Gly 195 200 205 Gly Phe Val Ala Cys Arg Ala Leu Ser Gln Arg Asn Ser Asp Pro Thr 210 215 220 Lys Ala Ser Arg Pro Trp Asp Ser Asn Arg Asp Gly Phe Val Met Gly 225 230 235 240 Glu Gly Ala Gly Val Leu Leu Leu Glu Glu Leu Glu His Ala Lys Lys 245 250 255 Arg Gly Ala Thr Ile Tyr Ala Glu Phe Leu Gly Gly Ser Phe Thr Cys 260 265 270 Asp Ala Tyr His Met Thr Glu Pro His Pro Glu Gly Ala Gly Val Ile 275 280 285 Leu Cys Ile Glu Lys Ala Leu Ala Gln Ala Gly Val Ser Lys Glu Asp 290 295 300 Val Asn Tyr Ile Asn Ala His Ala Thr Ser Thr Ser Ala Gly Asp Ile 305 310 315 320 Lys Glu Tyr Gln Ala Leu Ala Arg Cys Phe Gly Gln Asn Ser Glu Leu 325 330 335 Arg Val Asn Ser Thr Lys Ser Met Ile Gly His Leu Leu Gly Ala Ala 340 345 350 Gly Gly Val Glu Ala Val Thr Val Val Gln Ala Ile Arg Thr Gly Trp 355 360 365 Ile His Pro Asn Leu Asn Leu Glu Asp Pro Asp Lys Ala Val Asp Ala 370 375 380 Lys Leu Leu Val Gly Pro Lys Lys Glu Arg Leu Asn Val Lys Val Gly 385 390 395 400 Leu Ser Asn Ser Phe Gly Phe Gly Gly His Asn Ser Ser Ile Leu Phe 405 410 415 Ala Pro Cys Asn Val 420 32 420 PRT Cuphea wrightii 32 Lys Lys Lys Pro Val Thr Lys Gln Arg Arg Val Val Val Thr Gly Met 1 5 10 15 Gly Val Val Thr Pro Leu Gly His Asp Pro Asp Val Phe Tyr Asn Asn 20 25 30 Leu Leu Asp Gly Val Ser Gly Ile Ser Glu Ile Glu Thr Phe Asp Cys 35 40 45 Thr Gln Phe Pro Thr Arg Ile Ala Gly Glu Ile Lys Ser Phe Ser Thr 50 55 60 Asp Gly Trp Val Ala Pro Lys Leu Ser Lys Arg Met Asp Lys Phe Met 65 70 75 80 Leu Tyr Met Leu Thr Ala Gly Lys Lys Ala Leu Ala Asp Ala Gly Ile 85 90 95 Thr Glu Asp Val Met Lys Glu Leu Asp Lys Arg Lys Cys Gly Val Leu 100 105 110 Ile Gly Ser Gly Met Gly Gly Met Lys Leu Phe Asn Asp Ser Ile Glu 115 120 125 Ala Leu Arg Ile Ser Tyr Lys Lys Met Asn Pro Phe Cys Val Pro Phe 130 135 140 Ala Thr Thr Asn Met Gly Ser Ala Met Leu Ala Met Asp Leu Gly Trp 145 150 155 160 Met Gly Pro Asn Tyr Ser Ile Ser Thr Ala Cys Ala Thr Ser Asn Phe 165 170 175 Cys Ile Leu Asn Ala Ala Asn His Ile Ile Arg Gly Glu Ala Asp Met 180 185 190 Met Leu Cys Gly Gly Ser Asp Ala Ala Ile Ile Pro Ile Gly Leu Gly 195 200 205 Gly Phe Val Ala Cys Arg Ala Leu Ser Gln Arg Asn Asn Asp Pro Thr 210 215 220 Lys Ala Ser Arg Pro Trp Asp Ser Asn Arg Asp Gly Phe Val Met Gly 225 230 235 240 Glu Gly Ala Gly Val Leu Leu Leu Glu Glu Leu Glu His Ala Lys Lys 245 250 255 Arg Gly Ala Thr Ile Tyr Ala Glu Phe Leu Gly Gly Ser Phe Thr Cys 260 265 270 Asp Ala Tyr His Met Thr Glu Pro His Pro Glu Gly Ala Gly Val Ile 275 280 285 Leu Cys Ile Glu Arg Ala Leu Ala Gln Ser Gly Val Ser Lys Glu Asp 290 295 300 Val Asn Tyr Ile Asn Ala His Ala Thr Ser Thr Pro Ala Gly Asp Ile 305 310 315 320 Lys Glu Tyr Gln Ala Leu Ala Arg Ile Phe Ser Gln Asn Ser Glu Leu 325 330 335 Arg Val Asn Ser Thr Lys Ser Met Ile Gly His Leu Leu Gly Ala Ala 340 345 350 Gly Gly Val Glu Ala Val Thr Val Val Gln Ala Ile Arg Thr Gly Trp 355 360 365 Ile His Pro Asn Ile Asn Leu Glu Asn Pro Asp Asp Gly Val Asp Ala 370 375 380 Lys Leu Leu Val Gly Pro Lys Lys Glu Lys Leu Lys Val Lys Val Gly 385 390 395 400 Leu Ser Asn Ser Phe Gly Phe Gly Gly His Asn Ser Ser Ile Leu Phe 405 410 415 Ala Pro Cys Asn 420 33 420 PRT Hordeum vulgare 33 Lys Lys Arg Pro Asp Val Lys Gln Arg Arg Val Val Val Thr Gly Met 1 5 10 15 Gly Val Val Thr Pro Leu Gly His Asp Pro Asp Val Phe Tyr Thr Asn 20 25 30 Leu Leu Asp Gly His Ser Gly Ile Ser Glu Ile Glu Thr Phe Asp Cys 35 40 45 Ser Lys Phe Pro Thr Arg Ile Ala Gly Glu Ile Lys Ser Phe Ser Thr 50 55 60 Glu Gly Trp Val Val Pro Lys Leu Ser Lys Arg Met Asp Lys Phe Met 65 70 75 80 Leu Tyr Leu Ile Thr Ala Gly Lys Lys Ala Leu Glu Asn Gly Gly Leu 85 90 95 Thr Glu Glu Val Arg Asn Glu Leu Asp Lys Thr Arg Cys Gly Val Leu 100 105 110 Ile Gly Ser Ala Met Gly Gly Met Lys Val Phe Asn Asp Ala Ile Glu 115 120 125 Ala Leu Arg Val Ser Tyr Arg Lys Met Asn Pro Phe Cys Val Pro Phe 130 135 140 Ala Thr Thr Asn Met Gly Ser Ala Ile Leu Ala Met Asp Leu Gly Trp 145 150 155 160 Met Gly Pro Asn Tyr Ser Ile Ser Thr Ala Cys Ala Thr Ser Asn Phe 165 170 175 Cys Ile Leu Asn Ala Ala Asn His Ile Arg Arg Gly Glu Ala Asp Val 180 185 190 Met Leu Cys Gly Gly Ser Asp Ala Pro Leu Ile Pro Ile Gly Leu Gly 195 200 205 Gly Phe Val Ala Cys Arg Ala Leu Ser Gln Arg Asn Ser Asp Pro Thr 210 215 220 Lys Ala Ser Arg Pro Trp Asp Met Asp Arg Asp Gly Phe Val Met Gly 225 230 235 240 Glu Gly Ala Gly Val Leu Val Leu Glu Glu Leu Glu His Ala Lys Gln 245 250 255 Arg Gly Ala Thr Ile Tyr Ala Glu Phe Leu Gly Gly Ser Phe Thr Cys 260 265 270 Asp Ala Tyr His Met Thr Glu Pro His Pro Glu Gly Thr Gly Ile Thr 275 280 285 Leu Cys Ile Glu Lys Ala Leu Ala Asp Ser Gly Val Ala Arg Glu Glu 290 295 300 Ile Asn Tyr Val Asn Ala His Ala Thr Ser Thr Gln Ser Gly Asp Leu 305 310 315 320 Lys Glu Tyr Glu Ala Ile Val Arg Cys Phe Gly Gln Asn Pro Gln Leu 325 330 335 Arg Val Asn Ser Thr Lys Ser Met Thr Gly His Leu Ile Gly Ala Ala 340 345 350 Gly Gly Ile Glu Ala Val Ala Cys Val Gln Ala Ile Arg Thr Gly Trp 355 360 365 Val His Pro Asn Leu Asn Leu Glu Asn Pro Glu Lys Val Val Asp Val 370 375 380 Gly Val Leu Val Gly Ser Glu Lys Glu Arg Cys Glu Val Lys Val Ala 385 390 395 400 Leu Ser Asn Ser Phe Gly Phe Gly Gly His Asn Ser Ser Ile Leu Phe 405 410 415 Ala Pro Phe Lys 420 34 419 PRT Hordeum vulgare 34 Asn Asn Lys Ser Glu Thr Lys Gln Arg Arg Val Val Val Thr Gly Met 1 5 10 15 Gly Val Val Thr Pro Leu Gly His Glu Pro Asp Glu Phe Tyr Asn Asn 20 25 30 Leu Leu Gln Gly Val Ser Gly Val Ser Glu Ile Glu Ala Phe Asp Cys 35 40 45 Ser Ser Tyr Pro Thr Arg Ile Ala Gly Glu Ile Lys Ser Phe Ser Thr 50 55 60 Asp Gly Trp Val Ala Pro Lys Leu Ala Lys Arg Met Asp Lys Phe Met 65 70 75 80 Gln Tyr Leu Ile Val Ala Gly Lys Lys Ala Leu Asp Asn Gly Gly Val 85 90 95 Thr Glu Asp Ile Met Asn Glu Leu Asp Lys Ser Arg Cys Gly Val Leu 100 105 110 Ile Gly Ser Gly Met Gly Gly Met Lys Val Phe Ser Asp Ala Ile Glu 115 120 125 Ala Leu Arg Val Ser Tyr Arg Lys Met Asn Pro Phe Cys Val Pro Phe 130 135 140 Ala Thr Thr Asn Met Gly Ser Ala Val Leu Ala Met Asp Leu Gly Trp 145 150 155 160 Met Gly Pro Asn Tyr Ser Ile Ser Thr Ala Cys Ala Thr Ser Asn Phe 165 170 175 Cys Ile Leu Ser Ala Ala Asn His Ile Met Arg Gly Glu Thr Asp Leu 180 185 190 Met Leu Cys Gly Gly Ser Asp Ala Pro Ile Ile Pro Ile Gly Leu Gly 195 200 205 Gly Phe Val Ala Cys Arg Ala Leu Ser Gln Arg Asn Ser Asp Pro Thr 210 215 220 Lys Ala Ser Arg Pro Trp Asp Val Asp Arg Asp Gly Phe Val Met Gly 225 230 235 240 Glu Gly Ala Gly Val Leu Leu Leu Glu Glu Leu Glu His Ala Lys Gln 245 250 255 Arg Gly Ala Glu Ile Tyr Ala Glu Phe Leu Gly Gly Asn Phe Thr Cys 260 265 270 Asp Ala Tyr His Met Thr Glu Pro His Pro Glu Gly Lys Gly Val Ile 275 280 285 Leu Cys Val Glu Asn Ala Leu Ala Asp Ala Gly Val Thr Arg Gln Asp 290 295 300 Ile Asn Tyr Val Asn Ala His Ala Thr Ser Thr Gln Leu Gly Asp Leu 305 310 315 320 Lys Glu Phe Glu Ala Leu Arg Arg Cys Phe Gly Gln Asn Pro Gln Leu 325 330 335 Arg Val Asn Ser Thr Lys Ser Met Thr Gly His Leu Leu Gly Ala Ala 340 345 350 Gly Gly Ile Glu Ala Val Ala Ala Ile Gln Ala Ile Arg Thr Gly Trp 355 360 365 Ile His Pro Asn Ile Asn Leu Asn Asn Pro Glu Lys Asn Val Asp Val 370 375 380 Ser Leu Leu Val Gly Ser Gln Lys Glu Arg Cys Asp Val Lys Val Ala 385 390 395 400 Leu Ser Asn Ser Phe Gly Phe Gly Gly His Asn Ser Ser Ile Leu Phe 405 410 415 Ala Pro Phe 35 420 PRT Ricinus communis 35 Asn Lys Lys Pro Leu Met Lys Gln Arg Arg Val Val Val Thr Gly Met 1 5 10 15 Gly Val Val Ser Pro Leu Gly His Asp Ile Asp Val Tyr Tyr Asn Asn 20 25 30 Leu Leu Asp Gly Ser Ser Gly Ile Ser Gln Ile Asp Ser Phe Asp Cys 35 40 45 Ala Gln Phe Pro Thr Arg Ile Ala Gly Glu Ile Lys Ser Phe Ser Thr 50 55 60 Asp Gly Trp Val Ala Pro Lys Leu Ser Lys Arg Met Asp Lys Phe Met 65 70 75 80 Leu Tyr Met Leu Thr Ala Gly Lys Lys Ala Leu Ala Asp Gly Gly Ile 85 90 95 Thr Glu Asp Met Met Asp Glu Leu Asp Lys Ala Arg Cys Gly Val Leu 100 105 110 Ile Gly Ser Ala Met Gly Gly Met Lys Val Phe Asn Asp Ala Ile Glu 115 120 125 Ala Leu Arg Ile Ser Tyr Arg Lys Met Asn Pro Phe Cys Val Pro Phe 130 135 140 Ala Thr Thr Asn Met Gly Ser Ala Met Leu Ala Met Asp Leu Gly Trp 145 150 155 160 Met Gly Pro Asn Tyr Ser Ile Ser Thr Ala Cys Ala Thr Ser Asn Phe 165 170 175 Cys Ile Leu Asn Ala Ala Asn His Ile Ile Arg Gly Glu Ala Asp Ile 180 185 190 Met Leu Cys Gly Gly Ser Asp Ala Ala Ile Ile Pro Ile Gly Leu Gly 195 200 205 Gly Phe Val Ala Cys Arg Ala Leu Ser Gln Arg Asn Asp Asp Pro Thr 210 215 220 Lys Ala Ser Arg Pro Trp Asp Met Asn Arg Asp Gly Phe Val Met Gly 225 230 235 240 Glu Gly Ala Gly Val Leu Leu Leu Glu Glu Leu Glu His Ala Lys Lys 245 250 255 Arg Gly Ala Asn Ile Tyr Ala Glu Phe Leu Gly Gly Ser Phe Thr Cys 260 265 270 Asp Ala Tyr His Met Thr Glu Pro Arg Pro Asp Gly Val Gly Val Ile 275 280 285 Leu Cys Ile Glu Lys Ala Leu Ala Arg Ser Gly Val Ser Lys Glu Glu 290 295 300 Val Asn Tyr Ile Asn Ala His Ala Thr Ser Thr Pro Ala Gly Asp Leu 305 310 315 320 Lys Glu Tyr Glu Ala Leu Met Arg Cys Phe Ser Gln Asn Pro Asp Leu 325 330 335 Arg Val Asn Ser Thr Lys Ser Met Ile Gly His Leu Leu Gly Ala Ala 340 345 350 Gly Ala Val Glu Ala Ile Ala Thr Ile Gln Ala Ile Arg Thr Gly Trp 355 360 365 Val His Pro Asn Ile Asn Leu Glu Asn Pro Glu Glu Gly Val Asp Thr 370 375 380 Lys Val Leu Val Gly Pro Lys Lys Glu Arg Leu Asp Ile Lys Val Ala 385 390 395 400 Leu Ser Asn Ser Phe Gly Phe Gly Gly His Asn Ser Ser Ile Ile Phe 405 410 415 Ala Pro Tyr Lys 420 36 413 PRT Caenorhabditis elegans misc_feature (53)..(53) Xaa in position 53 in unknown. 36 Met Lys Leu Lys Ile Asn Lys Asn Phe Glu Met His Arg Val Val Ile 1 5 10 15 Thr Gly Met Gly Ala Ile Ser Pro Phe Gly Val Thr Val Asn Ala Leu 20 25 30 Arg Asn Gly Leu Asn Glu Gly Arg Ser Gly Leu Lys Tyr Asp Glu Ile 35 40 45 Leu Lys Phe Val Xaa Gly Ala Val Pro Gly Glu Arg Val Glu Asp Arg 50 55 60 Trp Ser Thr Gly Gln Gln Arg Glu Met Ser Lys Ala Ser Met Phe Val 65 70 75 80 Leu Ala Ala Ser Glu Glu Ala Leu Lys Gln Ala Lys Ala Glu Asp Val 85 90 95 Asp His Asn Glu Thr Leu Val Asn Ile Gly Thr Cys Met Ser Asp Leu 100 105 110 Glu His Ile Gly Glu Thr Ala Gln Lys Val Ser Glu Gly Gln Ser Arg 115 120 125 Arg Val Ser Pro Tyr Phe Val Pro Arg Ile Leu Asn Asn Leu Pro Ala 130 135 140 Gly Tyr Val Ala Met Lys Tyr Lys Met Arg Gly Gly Val Glu Ser Thr 145 150 155 160 Ser Thr Ala Cys Ala Thr Gly Leu His Cys Ile Gly Asn Ser Phe Arg 165 170 175 Ser Ile Arg Tyr Gly Asp Ser Arg Arg Ala Leu Ala Gly Ala Val Glu 180 185 190 Cys Ala Leu Asn Pro Ile Ala Leu Ala Gly Phe Asp Arg Met Arg Ala 195 200 205 Leu Ala Arg Gly Asp Gln Pro Asn Ile Ser Arg Pro Phe Asp Lys Lys 210 215 220 Arg Ala Gly Phe Val Met Ser Glu Gly Val Gly Leu Val Phe Met Glu 225 230 235 240 Arg Leu Glu Asp Ala Gln Ala Arg Gly Ala Gln Ile Leu Ala Glu Val 245 250 255 Val Gly Tyr Gly Ile Ser Ser Asp Cys Tyr His Ile Ser Thr Pro Asp 260 265 270 Pro Ser Ala Ile Gly Ala Val Leu Ser Met Asn Arg Ala Ile Gly Asn 275 280 285 Ala His Leu Glu Pro Lys Asp Ile Gly Tyr Val Asn Ala His Ala Thr 290 295 300 Ser Thr Pro Asn Gly Asp Ser Val Glu Ala Glu Ala Val Arg Gln Val 305 310 315 320 Phe Pro Glu Gln Asn Ile Ala Val Ser Ser Val Lys Gly His Ile Gly 325 330 335 His Leu Leu Gly Ala Ala Gly Ser Val Glu Ala Ile Ala Thr Ile Phe 340 345 350 Ala Met Asn Asp Asp Val Leu Pro Ala Asn Arg Asn Leu Glu Glu Thr 355 360 365 Asp Glu Gly Asn Gly Leu Asn Leu Leu Arg Glu Asn Gln Lys Trp Ser 370 375 380 Asp Val Ser Gly Asn Lys Ser Arg Ile Ser Ile Cys Asn Ser Phe Gly 385 390 395 400 Phe Gly Ala Thr Asn Ala Ser Leu Ile Leu Lys Gln Phe 405 410 37 442 PRT Saccharomyces cerevisiae 37 Met Ser Arg Arg Val Val Ile Thr Gly Leu Gly Cys Val Thr Pro Leu 1 5 10 15 Gly Arg Ser Leu Ser Glu Ser Trp Gly Asn Leu Leu Ser Ser Lys Asn 20 25 30 Gly Leu Thr Pro Ile Thr Ser Leu Pro Asn Tyr Asn Glu Asp Tyr Lys 35 40 45 Leu Arg Glu Lys Ser Ile Pro Ser Thr Ile Thr Val Gly Lys Ile Pro 50 55 60 Glu Asn Phe Gln Asn Glu Asn Ser Ala Ile Asn Lys Leu Leu Phe Thr 65 70 75 80 Ser Gln Asp Glu Arg Arg Thr Ser Ser Phe Ile Lys Leu Ala Leu Arg 85 90 95 Thr Thr Tyr Glu Ala Leu His Asn Ala Gly Leu Leu Asn Pro Asn Asp 100 105 110 Ile Thr Ile Asn Thr Ser Leu Cys Asn Leu Asp His Phe Gly Cys Leu 115 120 125 Ile Gly Ser Gly Ile Gly Ser Ile Gln Asp Ile Tyr Gln Thr Ser Leu 130 135 140 Gln Phe His Asn Asp Asn Lys Arg Ile Asn Pro Tyr Phe Val Pro Lys 145 150 155 160 Ile Leu Thr Asn Met Ala Ala Gly Asn Val Ser Ile Lys Phe Asn Leu 165 170 175 Arg Gly Leu Ser His Ser Val Ser Thr Ala Cys Ala Thr Gly Asn Asn 180 185 190 Ser Ile Gly Asp Ala Phe Asn Phe Ile Arg Leu Gly Met Gln Asp Ile 195 200 205 Cys Val Ala Gly Ala Ser Glu Thr Ser Leu His Pro Leu Ser Leu Ala 210 215 220 Gly Phe Ile Arg Ala Lys Ser Ile Thr Thr Asn Gly Ile Ser Arg Pro 225 230 235 240 Phe Asp Thr Gln Arg Ser Gly Phe Val Leu Gly Glu Gly Cys Gly Met 245 250 255 Ile Val Met Glu Ser Leu Glu His Ala Gln Lys Arg Asn Ala Asn Ile 260 265 270 Ile Ser Glu Leu Val Gly Tyr Gly Leu Ser Ser Asp Ala Cys His Ile 275 280 285 Thr Ser Pro Pro Ala Asp Gly Asn Gly Ala Lys Arg Ala Ile Glu Met 290 295 300 Ala Leu Lys Met Ala Arg Leu Glu Pro Thr Asp Val Asp Tyr Val Asn 305 310 315 320 Ala His Ala Thr Ser Thr Leu Leu Gly Asp Lys Ala Glu Cys Leu Ala 325 330 335 Val Ala Ser Ala Leu Leu Pro Gly Arg Ser Lys Ser Lys Pro Leu Tyr 340 345 350 Ile Ser Ser Asn Lys Gly Ala Ile Gly His Leu Leu Gly Ala Ala Gly 355 360 365 Ala Val Glu Ser Ile Phe Thr Ile Cys Ser Leu Lys Asp Asp Lys Met 370 375 380 Pro His Thr Leu Asn Leu Asp Asn Val Leu Thr Leu Glu Asn Asn Glu 385 390 395 400 Ala Asp Lys Leu His Phe Ile Arg Asp Lys Pro Ile Val Gly Ala Asn 405 410 415 Pro Lys Tyr Ala Leu Cys Asn Ser Phe Gly Phe Gly Gly Val Asn Thr 420 425 430 Ser Leu Leu Phe Lys Lys Trp Glu Gly Ser 435 440 38 410 PRT Escherichia coli 38 Met Ser Lys Arg Arg Val Val Val Thr Gly Leu Gly Met Leu Ser Pro 1 5 10 15 Val Gly Asn Thr Val Glu Ser Thr Trp Lys Ala Leu Leu Ala Gly Gln 20 25 30 Ser Gly Ile Ser Leu Ile Asp His Phe Asp Thr Ser Ala Tyr Ala Thr 35 40 45 Lys Phe Ala Gly Leu Val Lys Asp Phe Asn Cys Glu Asp Ile Ile Ser 50 55 60 Arg Lys Glu Gln Arg Lys Met Asp Ala Phe Ile Gln Tyr Gly Ile Val 65 70 75 80 Ala Gly Val Gln Ala Met Gln Asp Ser Gly Leu Glu Ile Thr Glu Glu 85 90 95 Asn Ala Thr Arg Ile Gly Ala Ala Ile Gly Ser Gly Ile Gly Gly Leu 100 105 110 Gly Leu Ile Glu Glu Asn His Thr Ser Leu Met Asn Gly Gly Pro Arg 115 120 125 Lys Ile Ser Pro Phe Phe Val Pro Ser Thr Ile Val Asn Met Val Ala 130 135 140 Gly His Leu Thr Ile Met Tyr Gly Leu Arg Gly Pro Ser Ile Ser Ile 145 150 155 160 Ala Thr Ala Cys Thr Ser Gly Val His Asn Ile Gly His Ala Ala Arg 165 170 175 Ile Ile Ala Tyr Gly Asp Ala Asp Val Met Val Ala Gly Gly Ala Glu 180 185 190 Lys Ala Ser Thr Pro Leu Gly Val Gly Gly Phe Gly Ala Ala Arg Ala 195 200 205 Leu Ser Thr Arg Asn Asp Asn Pro Gln Ala Ala Ser Arg Pro Trp Asp 210 215 220 Lys Glu Arg Asp Gly Phe Val Leu Gly Asp Gly Ala Gly Met Leu Val 225 230 235 240 Leu Glu Glu Tyr Glu His Ala Lys Lys Arg Gly Ala Lys Ile Tyr Ala 245 250 255 Glu Leu Val Gly Phe Gly Met Ser Ser Asp Ala Tyr His Met Thr Ser 260 265 270 Pro Pro Glu Asn Gly Ala Gly Ala Ala Leu Ala Met Ala Asn Ala Leu 275 280 285 Arg Asp Ala Gly Ile Glu Ala Ser Gln Ile Gly Tyr Val Asn Ala His 290 295 300 Gly Thr Ser Thr Pro Ala Gly Asp Lys Ala Glu Ala Gln Ala Val Lys 305 310 315 320 Thr Ile Phe Gly Glu Ala Ala Ser Arg Val Leu Val Ser Ser Thr Lys 325 330 335 Ser Met Thr Gly His Leu Leu Gly Ala Ala Gly Ala Val Glu Ser Ile 340 345 350 Tyr Ser Ile Leu Ala Leu Arg Asp Gln Ala Val Pro Pro Thr Ile Asn 355 360 365 Leu Asp Asn Pro Asp Glu Gly Cys Asp Leu Asp Phe Val Pro His Glu 370 375 380 Ala Arg Gln Val Ser Gly Met Glu Tyr Thr Leu Cys Asn Ser Phe Gly 385 390 395 400 Phe Gly Gly Thr Asn Gly Ser Leu Ile Phe 405 410 39 406 PRT Escherichia coli 39 Met Lys Arg Ala Val Ile Thr Gly Leu Gly Ile Val Ser Ser Ile Gly 1 5 10 15 Asn Asn Gln Gln Glu Val Leu Ala Ser Leu Arg Glu Gly Arg Ser Gly 20 25 30 Ile Thr Phe Ser Gln Glu Leu Lys Asp Ser Gly Met Arg Ser His Val 35 40 45 Trp Gly Asn Val Lys Leu Asp Thr Thr Gly Leu Ile Asp Arg Lys Val 50 55 60 Val Arg Phe Met Ser Asp Ala Ser Ile Tyr Ala Phe Leu Ser Met Glu 65 70 75 80 Gln Ala Ile Ala Asp Ala Gly Leu Ser Pro Glu Ala Tyr Gln Asn Asn 85 90 95 Pro Arg Val Gly Leu Ile Ala Gly Ser Gly Gly Gly Ser Pro Arg Phe 100 105 110 Gln Val Phe Gly Ala Asp Ala Met Arg Gly Pro Arg Gly Leu Lys Ala 115 120 125 Val Gly Pro Tyr Val Val Thr Lys Ala Met Ala Ser Gly Val Ser Ala 130 135 140 Cys Leu Ala Thr Pro Phe Lys Ile His Gly Val Asn Tyr Ser Ile Ser 145 150 155 160 Ser Ala Cys Ala Thr Ser Ala His Cys Ile Gly Asn Ala Val Glu Gln 165 170 175 Ile Gln Leu Gly Lys Gln Asp Ile Val Phe Ala Gly Gly Gly Glu Glu 180 185 190 Leu Cys Trp Glu Met Ala Cys Glu Phe Asp Ala Met Gly Ala Leu Ser 195 200 205 Thr Lys Tyr Asn Asp Thr Pro Glu Lys Ala Ser Arg Thr Tyr Asp Ala 210 215 220 His Arg Asp Gly Phe Val Ile Ala Gly Gly Gly Gly Met Val Val Val 225 230 235 240 Glu Glu Leu Glu His Ala Leu Ala Arg Gly Ala His Ile Tyr Ala Glu 245 250 255 Ile Val Gly Tyr Gly Ala Thr Ser Asp Gly Ala Asp Met Val Ala Pro 260 265 270 Ser Gly Glu Gly Ala Val Arg Cys Met Lys Met Ala Met His Gly Val 275 280 285 Asp Thr Pro Ile Asp Tyr Leu Asn Ser His Gly Thr Ser Thr Pro Val 290 295 300 Gly Asp Val Lys Glu Leu Ala Ala Ile Arg Glu Val Phe Gly Asp Lys 305 310 315 320 Ser Pro Ala Ile Ser Ala Thr Lys Ala Met Thr Gly His Ser Leu Gly 325 330 335 Ala Ala Gly Val Gln Glu Ala Ile Tyr Ser Leu Leu Met Leu Glu His 340 345 350 Gly Phe Ile Ala Pro Ser Ile Asn Ile Glu Glu Leu Asp Glu Gln Ala 355 360 365 Ala Gly Leu Asn Ile Val Thr Glu Thr Thr Asp Arg Glu Leu Thr Thr 370 375 380 Val Met Ser Asn Ser Phe Gly Phe Gly Gly Thr Asn Ala Thr Leu Val 385 390 395 400 Met Arg Lys Leu Lys Asp 405 40 416 PRT Mycobacterium tuberculosis 40 Met Ser Gln Pro Ser Thr Ala Asn Gly Gly Phe Pro Ser Val Val Val 1 5 10 15 Thr Ala Val Thr Ala Thr Thr Ser Ile Ser Pro Asp Ile Glu Ser Thr 20 25 30 Trp Lys Gly Leu Leu Ala Gly Glu Ser Gly Ile His Ala Leu Glu Asp 35 40 45 Glu Phe Val Thr Lys Trp Asp Leu Ala Val Lys Ile Gly Gly His Leu 50 55 60 Lys Asp Pro Val Asp Ser His Met Gly Arg Leu Asp Met Arg Arg Met 65 70 75 80 Ser Tyr Val Gln Arg Met Gly Lys Leu Leu Gly Gly Gln Leu Trp Glu 85 90 95 Ser Ala Gly Ser Pro Glu Val Asp Pro Asp Arg Phe Ala Val Val Val 100 105 110 Gly Thr Gly Leu Gly Gly Ala Glu Arg Ile Val Glu Ser Tyr Asp Leu 115 120 125 Met Asn Ala Gly Gly Pro Arg Lys Val Ser Pro Leu Ala Val Gln Met 130 135 140 Ile Met Pro Asn Gly Ala Ala Ala Val Ile Gly Leu Gln Leu Gly Ala 145 150 155 160 Arg Ala Gly Val Met Thr Pro Val Ser Ala Cys Ser Ser Gly Ser Glu 165 170 175 Ala Ile Ala His Ala Trp Arg Gln Ile Val Met Gly Asp Ala Asp Val 180 185 190 Ala Val Cys Gly Gly Val Glu Gly Pro Ile Glu Ala Leu Pro Ile Ala 195 200 205 Ala Phe Ser Met Met Arg Ala Met Ser Thr Arg Asn Asp Glu Pro Glu 210 215 220 Arg Ala Ser Arg Pro Phe Asp Lys Asp Arg Asp Gly Phe Val Phe Gly 225 230 235 240 Glu Ala Gly Ala Leu Met Leu Ile Glu Thr Glu Glu His Ala Lys Ala 245 250 255 Arg Gly Ala Lys Pro Leu Ala Arg Leu Leu Gly Ala Gly Ile Thr Ser 260 265 270 Asp Ala Phe His Met Val Ala Pro Ala Ala Asp Gly Val Arg Ala Gly 275 280 285 Arg Ala Met Thr Arg Ser Leu Glu Leu Ala Gly Leu Ser Pro Ala Asp 290 295 300 Ile Asp His Val Asn Ala His Gly Thr Ala Thr Pro Ile Gly Asp Ala 305 310 315 320 Ala Glu Ala Asn Ala Ile Arg Val Ala Gly Cys Asp Gln Ala Ala Val 325 330 335 Tyr Ala Pro Lys Ser Ala Leu Gly His Ser Ile Gly Ala Val Gly Ala 340 345 350 Leu Glu Ser Val Leu Thr Val Leu Thr Leu Arg Asp Gly Val Ile Pro 355 360 365 Pro Thr Leu Asn Tyr Glu Thr Pro Asp Pro Glu Ile Asp Leu Asp Val 370 375 380 Val Ala Gly Glu Pro Arg Tyr Gly Asp Tyr Arg Tyr Ala Val Asn Asn 385 390 395 400 Ser Phe Gly Phe Gly Gly His Asn Val Ala Leu Ala Phe Gly Arg Tyr 405 410 415 41 438 PRT Mycobacterium tuberculosis 41 Met Gly Val Pro Pro Leu Ala Gly Ala Ser Arg Thr Asp Met Glu Gly 1 5 10 15 Thr Phe Ala Arg Pro Met Thr Glu Leu Val Thr Gly Lys Ala Phe Pro 20 25 30 Tyr Val Val Val Thr Gly Ile Ala Met Thr Thr Ala Leu Ala Thr Asp 35 40 45 Ala Glu Thr Thr Trp Lys Leu Leu Leu Asp Arg Gln Ser Gly Ile Arg 50 55 60 Thr Leu Asp Asp Pro Phe Val Glu Glu Phe Asp Leu Pro Val Arg Ile 65 70 75 80 Gly Gly His Leu Leu Glu Glu Phe Asp His Gln Leu Thr Arg Ile Glu 85 90 95 Leu Arg Arg Met Gly Tyr Leu Gln Arg Met Ser Thr Val Leu Ser Arg 100 105 110 Arg Leu Trp Glu Asn Ala Gly Ser Pro Glu Val Asp Thr Asn Arg Leu 115 120 125 Met Val Ser Ile Gly Thr Gly Leu Gly Ser Ala Glu Glu Leu Val Phe 130 135 140 Ser Tyr Asp Asp Met Arg Ala Arg Gly Met Lys Ala Val Ser Pro Leu 145 150 155 160 Thr Val Gln Lys Tyr Met Pro Asn Gly Ala Ala Ala Ala Val Gly Leu 165 170 175 Glu Arg His Ala Lys Ala Gly Val Met Thr Pro Val Ser Ala Cys Ala 180 185 190 Ser Gly Ala Glu Ala Ile Ala Arg Ala Trp Gln Gln Ile Val Leu Gly 195 200 205 Glu Ala Asp Ala Ala Ile Cys Gly Gly Val Glu Thr Arg Ile Glu Ala 210 215 220 Val Pro Ile Ala Gly Phe Ala Gln Met Arg Ile Val Met Ser Thr Asn 225 230 235 240 Asn Asp Asp Pro Ala Gly Ala Cys Arg Pro Phe Asp Arg Asp Arg Asp 245 250 255 Gly Phe Val Phe Gly Glu Gly Gly Ala Leu Leu Leu Ile Glu Thr Glu 260 265 270 Glu His Ala Lys Ala Arg Gly Ala Asn Ile Leu Ala Arg Ile Met Gly 275 280 285 Ala Ser Ile Thr Ser Asp Gly Phe His Met Val Ala Pro Asp Pro Asn 290 295 300 Gly Glu Arg Ala Gly His Ala Ile Thr Arg Ala Ile Gln Leu Ala Gly 305 310 315 320 Leu Ala Pro Gly Asp Ile Asp His Val Asn Ala His Ala Thr Gly Thr 325 330 335 Gln Val Gly Asp Leu Ala Glu Gly Arg Ala Ile Asn Asn Ala Leu Gly 340 345 350 Gly Asn Arg Pro Ala Val Tyr Ala Pro Lys Ser Ala Leu Gly His Ser 355 360 365 Val Gly Ala Val Gly Ala Val Glu Ser Ile Leu Thr Val Leu Ala Leu 370 375 380 Arg Asp Gln Val Ile Pro Pro Thr Leu Asn Leu Val Asn Leu Asp Pro 385 390 395 400 Glu Ile Asp Leu Asp Val Val Ala Gly Glu Pro Arg Pro Gly Asn Tyr 405 410 415 Arg Tyr Ala Ile Asn Asn Ser Phe Gly Phe Gly Gly His Asn Val Ala 420 425 430 Ile Ala Phe Gly Arg Tyr 435 42 418 PRT Rattus norvegicus 42 Ser Arg Ala Ser Arg Gln Arg Arg Ala Met Glu Glu Val Val Ile Ala 1 5 10 15 Gly Met Ser Gly Lys Leu Pro Glu Ser Glu Asn Leu Gln Glu Phe Trp 20 25 30 Ala Asn Leu Ile Gly Gly Val Asp Met Val Thr Asp Asp Asp Arg Arg 35 40 45 Trp Lys Ala Gly Leu Tyr Gly Leu Pro Lys Arg Ser Gly Lys Leu Lys 50 55 60 Asp Leu Ser Lys Phe Asp Ala Ser Phe Phe Gly Val His Pro Lys Gln 65 70 75 80 Ala His Thr Met Asp Pro Gln Leu Arg Leu Leu Leu Glu Val Ser Tyr 85 90 95 Glu Ala Ile Val Asp Gly Gly Ile Asn Pro Ala Ser Leu Arg Gly Thr 100 105 110 Asn Thr Gly Val Trp Val Gly Val Ser Gly Ser Glu Ala Ser Glu Ala 115 120 125 Leu Ser Arg Asp Pro Glu Thr Leu Leu Gly Tyr Ser Met Val Gly Cys 130 135 140 Gln Arg Ala Met Met Ala Asn Arg Leu Ser Phe Phe Phe Asp Phe Lys 145 150 155 160 Gly Pro Ser Ile Ala Leu Asp Thr Ala Cys Ser Ser Ser Leu Leu Ala 165 170 175 Leu Gln Asn Ala Tyr Gln Ala Ile Arg Ser Gly Glu Cys Pro Ala Ala 180 185 190 Ile Val Gly Gly Ile Asn Leu Leu Leu Lys Pro Asn Thr Ser Val Gln 195 200 205 Phe Met Lys Leu Gly Met Leu Ser Pro Asp Gly Thr Cys Arg Ser Phe 210 215 220 Asp Asp Ser Gly Asn Gly Tyr Cys Arg Ala Glu Ala Val Val Ala Val 225 230 235 240 Leu Leu Thr Lys Lys Ser Leu Ala Arg Arg Val Tyr Ala Thr Ile Leu 245 250 255 Asn Ala Gly Thr Asn Thr Asp Gly Cys Lys Glu Gln Gly Val Thr Phe 260 265 270 Pro Ser Gly Glu Ala Gln Glu Gln Leu Ile Arg Ser Leu Tyr Gln Pro 275 280 285 Gly Gly Val Ala Pro Glu Ser Leu Glu Tyr Ile Glu Ala His Gly Thr 290 295 300 Gly Thr Lys Val Gly Asp Pro Gln Glu Leu Asn Gly Ile Thr Arg Ser 305 310 315 320 Leu Cys Ala Phe Arg Gln Ser Pro Leu Leu Ile Gly Ser Thr Lys Ser 325 330 335 Asn Met Gly His Pro Glu Pro Ala Ser Gly Leu Ala Ala Leu Thr Lys 340 345 350 Val Leu Leu Ser Leu Glu Asn Gly Val Trp Ala Pro Asn Leu His Phe 355 360 365 His Asn Pro Asn Pro Glu Ile Pro Ala Leu Leu Asp Gly Arg Leu Gln 370 375 380 Val Val Asp Arg Pro Leu Pro Val Arg Gly Gly Ile Val Gly Ile Asn 385 390 395 400 Ser Phe Gly Phe Gly Gly Ala Asn Val His Val Ile Leu Gln Pro Asn 405 410 415 Ala Ser 43 401 PRT Rhizobium sp. Nodulation Protein E 43 Met Asp Arg Arg Val Val Ile Thr Gly Ile Gly Gly Leu Cys Gly Leu 1 5 10 15 Gly Thr Asn Ala Ala Ser Ile Trp Lys Glu Met Arg Glu Gly Pro Ser 20 25 30 Ala Ile Ser Pro Ile Ile Thr Thr Asp Leu Tyr Asp Leu Glu Gly Thr 35 40 45 Val Gly Leu Glu Ile Lys Ala Ile Pro Glu His Asp Ile Pro Arg Lys 50 55 60 Gln Leu Val Ser Met Asp Arg Phe Ser Leu Leu Ala Val Ile Ala Ala 65 70 75 80 Thr Glu Ala Met Lys Gln Ala Gly Leu Ser Cys Asp Glu Gln Asn Ala 85 90 95 His Arg Phe Gly Ala Ala Met Gly Leu Gly Gly Pro Gly Trp Asp Thr 100 105 110 Ile Glu Glu Thr Tyr Arg Ser Ile Leu Leu Asp Gly Val Thr Arg Ala 115 120 125 Arg Ile Phe Thr Ala Pro Lys Gly Met Pro Ser Ala Ala Ala Gly His 130 135 140 Val Ser Ile Phe Leu Gly Leu Arg Gly Pro Val Phe Gly Val Thr Ser 145 150 155 160 Ala Cys Ala Ala Gly Asn His Ala Ile Ala Ser Ala Val Asp Gln Ile 165 170 175 Arg Leu Gly Arg Ala Asp Val Met Leu Ala Gly Gly Ser Asp Ala Pro 180 185 190 Leu Thr Trp Gly Val Leu Lys Ser Trp Glu Ala Leu Arg Val Leu Ala 195 200 205 Pro Asp Thr Cys Arg Pro Phe Ser Ala Asp Arg Lys Gly Val Val Leu 210 215 220 Gly Glu Gly Ala Gly Met Ala Val Leu Glu Ser Tyr Glu His Ala Ala 225 230 235 240 Ala Arg Gly Ala Thr Met Leu Ala Glu Val Ala Gly Ile Gly Leu Ser 245 250 255 Gly Asp Ala Tyr Asp Ile Val Met Pro Ser Ile Glu Gly Pro Glu Ala 260 265 270 Ala Met Arg Ser Cys Leu Ala Asp Ala Glu Leu Asn Pro Asp Asp Val 275 280 285 Asp Tyr Leu Asn Ala His Gly Thr Gly Thr Val Ala Asn Asp Glu Met 290 295 300 Glu Thr Ala Ala Ile Lys Arg Val Phe Gly Asp His Ala Phe Gln Met 305 310 315 320 Ser Val Ser Ser Thr Lys Ser Met His Ala His Cys Leu Gly Ala Ala 325 330 335 Ser Ala Leu Glu Met Ile Ala Cys Val Met Ala Ile Gln Glu Gly Val 340 345 350 Ile Pro Pro Thr Ala Asn Tyr Arg Glu Pro Asp Pro Gln Cys Asp Leu 355 360 365 Asp Val Thr Pro Asn Val Pro Arg Glu Gln Arg Cys Gly Ser Met Ser 370 375 380 Asn Ala Phe Ala Met Gly Gly Thr Asn Ala Val Leu Ala Phe Arg Gln 385 390 395 400 Val 44 419 PRT Streptomyces polyketide synthase 44 Val Asn Arg Arg Ile Val Ile Thr Gly Ile Gly Val Val Ala Pro Gly 1 5 10 15 Ala Val Gly Thr Lys Pro Phe Trp Glu Leu Leu Leu Ser Gly Thr Thr 20 25 30 Ala Thr Arg Ala Ile Ser Thr Phe Asp Ala Thr Pro Phe Arg Ser Arg 35 40 45 Ile Ala Ala Glu Cys Asp Phe Asp Pro Val Ala Ala Gly Leu Ser Ala 50 55 60 Glu Gln Ala Arg Arg Leu Asp Arg Ala Gly Gln Phe Ala Leu Val Ala 65 70 75 80 Gly Gln Glu Ala Leu Ala Asp Ser Gly Leu Arg Ile Asp Glu Asp Ser 85 90 95 Ala His Arg Val Gly Val Cys Val Gly Thr Ala Val Gly Cys Thr Gln 100 105 110 Lys Leu Glu Ser Glu Tyr Val Ala Leu Ser Ala Gly Gly Ala His Trp 115 120 125 Val Val Asp Pro Gly Arg Gly Ser Pro Glu Leu Tyr Asp Tyr Phe Val 130 135 140 Pro Ser Ser Leu Ala Ala Glu Val Ala Trp Leu Ala Gly Ala Glu Gly 145 150 155 160 Pro Val Asn Ile Val Ser Ala Gly Cys Thr Ser Gly Ile Asp Ser Ile 165 170 175 Gly Tyr Ala Cys Glu Leu Ile Arg Glu Gly Thr Val Asp Ala Met Val 180 185 190 Ala Gly Gly Val Asp Ala Pro Ile Ala Pro Ile Thr Val Ala Cys Phe 195 200 205 Asp Ala Ile Arg Ala Thr Ser Asp His Asn Asp Thr Pro Glu Thr Ala 210 215 220 Ser Arg Pro Phe Ser Arg Ser Arg Asn Gly Phe Val Leu Gly Glu Gly 225 230 235 240 Gly Ala Ile Val Val Leu Glu Glu Ala Glu Ala Ala Val Arg Arg Gly 245 250 255 Ala Arg Ile Tyr Ala Glu Ile Gly Gly Tyr Ala Ser Arg Gly Asn Ala 260 265 270 Tyr His Met Thr Gly Leu Arg Ala Asp Gly Ala Glu Met Ala Ala Ala 275 280 285 Ile Thr Ala Ala Leu Asp Glu Ala Arg Arg Asp Pro Ser Asp Val Asp 290 295 300 Tyr Val Asn Ala His Gly Thr Ala Thr Lys Gln Asn Asp Arg His Glu 305 310 315 320 Thr Ser Ala Phe Lys Arg Ser Leu Gly Glu His Ala Tyr Arg Val Pro 325 330 335 Ile Ser Ser Ile Lys Ser Met Ile Gly His Ser Leu Gly Ala Val Gly 340 345 350 Ser Leu Glu Val Ala Ala Thr Ala Leu Ala Val Glu Tyr Gly Val Ile 355 360 365 Pro Pro Thr Ala Asn Leu His Asp Pro Asp Pro Glu Leu Asp Leu Asp 370 375 380 Tyr Val Pro Leu Thr Ala Arg Glu Lys Arg Val Arg His Ala Leu Thr 385 390 395 400 Val Gly Ser Gly Phe Gly Gly Phe Gln Ser Ala Met Leu Leu Ser Arg 405 410 415 Leu Glu Arg 45 416 PRT Synechocystis sp. 45 Met Ala Asn Leu Glu Lys Lys Arg Val Val Val Thr Gly Leu Gly Ala 1 5 10 15 Ile Thr Pro Ile Gly Asn Thr Leu Gln Asp Tyr Trp Gln Gly Leu Met 20 25 30 Glu Gly Arg Asn Gly Ile Gly Pro Ile Thr Arg Phe Asp Ala Ser Asp 35 40 45 Gln Ala Cys Arg Phe Gly Gly Glu Val Lys Asp Phe Asp Ala Thr Gln 50 55 60 Phe Leu Asp Arg Lys Glu Ala Lys Arg Met Asp Arg Phe Cys His Phe 65 70 75 80 Ala Val Cys Ala Ser Gln Gln Ala Ile Asn Asp Ala Lys Leu Val Ile 85 90 95 Asn Glu Leu Asn Ala Asp Glu Ile Gly Val Leu Ile Gly Thr Gly Ile 100 105 110 Gly Gly Leu Lys Val Leu Glu Asp Gln Gln Thr Ile Leu Leu Asp Lys 115 120 125 Gly Pro Ser Arg Cys Ser Pro Phe Met Ile Pro Met Met Ile Ala Asn 130 135 140 Met Ala Ser Gly Leu Thr Ala Ile Asn Leu Gly Ala Lys Gly Pro Asn 145 150 155 160 Asn Cys Thr Val Thr Ala Cys Ala Ala Gly Ser Asn Ala Ile Gly Asp 165 170 175 Ala Phe Arg Leu Val Gln Asn Gly Tyr Ala Lys Ala Met Ile Cys Gly 180 185 190 Gly Thr Glu Ala Ala Ile Thr Pro Leu Ser Tyr Ala Gly Phe Ala Ser 195 200 205 Ala Arg Ala Leu Ser Phe Arg Asn Asp Asp Pro Leu His Ala Ser Arg 210 215 220 Pro Phe Asp Lys Asp Arg Asp Gly Phe Val Met Gly Glu Gly Ser Gly 225 230 235 240 Ile Leu Ile Leu Glu Glu Leu Glu Ser Ala Leu Ala Arg Gly Ala Lys 245 250 255 Ile Tyr Gly Glu Met Val Gly Tyr Ala Met Thr Cys Asp Ala Tyr His 260 265 270 Ile Thr Ala Pro Val Pro Asp Gly Arg Gly Ala Thr Arg Ala Ile Ala 275 280 285 Trp Ala Leu Lys Asp Ser Gly Leu Lys Pro Glu Met Val Ser Tyr Ile 290 295 300 Asn Ala His Gly Thr Ser Thr Pro Ala Asn Asp Val Thr Glu Thr Arg 305 310 315 320 Ala Ile Lys Gln Ala Leu Gly Asn His Ala Tyr Asn Ile Ala Val Ser 325 330 335 Ser Thr Lys Ser Met Thr Gly His Leu Leu Gly Gly Ser Gly Gly Ile 340 345 350 Glu Ala Val Ala Thr Val Met Ala Ile Ala Glu Asp Lys Val Pro Pro 355 360 365 Thr Ile Asn Leu Glu Asn Pro Asp Pro Glu Cys Asp Leu Asp Tyr Val 370 375 380 Pro Gly Gln Ser Arg Ala Leu Ile Val Asp Val Ala Leu Ser Asn Ser 385 390 395 400 Phe Gly Phe Gly Gly His Asn Val Thr Leu Ala Phe Lys Lys Tyr Gln 405 410 415 46 441 PRT Vibrio harveyi 46 Ser Asp Tyr His Asn His Phe Ile Asn Val Lys Ala Val Ala Arg Pro 1 5 10 15 Leu Phe Phe Cys Leu Phe Trp Arg Thr Ser Val Ala Asn Asn Arg Arg 20 25 30 Val Val Ile Thr Gly Leu Gly Ile Val Ser Pro Val Gly Asn Thr Val 35 40 45 Ala Thr Ala Trp Glu Ala Ile Lys Ser Gly Ile Ser Gly Ile Glu Asn 50 55 60 Ile Glu His Phe Asp Thr Thr Asn Phe Ser Thr Lys Phe Ala Gly Leu 65 70 75 80 Val Asn Asp Phe Asp Ala Glu Ser Val Gly Ile Asn Arg Lys Asp Cys 85 90 95 Arg Lys Met Asp Leu Phe Ile Gln Tyr Gly Ile Ala Ala Ala Glu Gln 100 105 110 Ala Leu Thr Asp Ser Gly Leu Glu Ile Thr Glu Gln Asn Ala Thr Arg 115 120 125 Ile Gly Thr Ala Ile Gly Ser Gly Ile Gly Gly Leu Gly Leu Ile Glu 130 135 140 Gln Asn Val His Ser Phe Val Lys Gly Gly Ala Arg Lys Val Ser Pro 145 150 155 160 Phe Phe Val Pro Ala Thr Ile Val Asn Met Val Ala Gly His Val Ser 165 170 175 Ile Arg Asn Asn Leu Lys Gly Pro Asn Ile Ala Ile Ala Thr Ala Cys 180 185 190 Thr Ser Gly Thr His Cys Ile Gly Gln Ser Ala Arg Met Ile Ala Tyr 195 200 205 Gly Asp Ala Asp Val Met Val Ala Gly Gly Ala Glu Lys Ala Ser Thr 210 215 220 Glu Met Gly Leu Ala Gly Phe Gly Ser Ala Lys Ala Leu Ser Thr Arg 225 230 235 240 Asn Asp Asp Pro Gln Lys Ala Ser Arg Pro Trp Asp Lys Asp Arg Asp 245 250 255 Gly Phe Val Leu Gly Asp Gly Ala Gly Val Leu Val Met Glu Glu Tyr 260 265 270 Glu His Ala Val Ala Arg Gly Ala Thr Ile Tyr Ala Glu Leu Ala Gly 275 280 285 Phe Gly Met Ser Gly Asp Ala Phe His Met Thr Ser Pro Pro Glu Asp 290 295 300 Gly Ala Gly Ala Ala Leu Ser Met Asn Asn Ala Ile Ala Asp Ala Gly 305 310 315 320 Ile Thr Ala Asp Lys Val Gly Tyr Val Asn Ala His Gly Thr Ser Thr 325 330 335 Pro Ala Gly Asp Lys Ala Glu Thr Ala Ala Val Lys Ser Val Phe Gly 340 345 350 Glu His Ala Tyr Thr Leu Ala Val Ser Ser Thr Lys Ser Met Thr Gly 355 360 365 His Leu Leu Gly Ala Ala Gly Ala Ile Glu Ala Ile Phe Thr Ile Leu 370 375 380 Ala Leu Lys Asp Gln Ile Leu Pro Pro Thr Ile Asn Leu Glu Asn Pro 385 390 395 400 Ser Glu Gly Cys Asp Leu Asp Tyr Val Thr Asp Gly Ala Arg Pro Val 405 410 415 Asn Met Glu Tyr Ala Leu Ser Asn Ser Phe Gly Phe Gly Gly Thr Asn 420 425 430 Gly Ser Leu Leu Phe Lys Lys Ala Asp 435 440 47 409 PRT Escherichia coli 47 Ser Lys Arg Arg Val Val Val Thr Gly Leu Gly Met Leu Ser Pro Val 1 5 10 15 Gly Asn Thr Val Glu Ser Thr Trp Lys Ala Leu Leu Ala Gly Gln Ser 20 25 30 Gly Ile Ser Leu Ile Asp His Phe Asp Thr Ser Ala Tyr Ala Thr Lys 35 40 45 Phe Ala Gly Leu Val Lys Asp Phe Asn Cys Glu Asp Ile Ile Ser Arg 50 55 60 Lys Glu Gln Arg Lys Met Asp Ala Phe Ile Gln Tyr Gly Ile Val Ala 65 70 75 80 Gly Val Gln Ala Met Gln Asp Ser Gly Leu Glu Ile Thr Glu Glu Asn 85 90 95 Ala Thr Arg Ile Gly Ala Ala Ile Gly Ser Gly Ile Gly Gly Leu Gly 100 105 110 Leu Ile Glu Glu Asn His Thr Ser Leu Met Asn Gly Gly Pro Arg Lys 115 120 125 Ile Ser Pro Phe Phe Val Pro Ser Thr Ile Val Asn Met Val Ala Gly 130 135 140 His Leu Thr Ile Met Tyr Gly Leu Arg Gly Pro Ser Ile Ser Ile Ala 145 150 155 160 Thr Ala Cys Thr Ser Gly Val His Asn Ile Gly His Ala Ala Arg Ile 165 170 175 Ile Ala Tyr Gly Asp Ala Asp Val Met Val Ala Gly Gly Ala Glu Lys 180 185 190 Ala Ser Thr Pro Leu Gly Val Gly Gly Phe Gly Ala Ala Arg Ala Leu 195 200 205 Ser Thr Arg Asn Asp Asn Pro Gln Ala Ala Ser Arg Pro Trp Asp Lys 210 215 220 Glu Arg Asp Gly Phe Val Leu Gly Asp Gly Ala Gly Met Leu Val Leu 225 230 235 240 Glu Glu Tyr Glu His Ala Lys Lys Arg Gly Ala Lys Ile Tyr Ala Glu 245 250 255 Leu Val Gly Phe Gly Met Ser Ser Asp Ala Tyr His Met Thr Ser Pro 260 265 270 Pro Glu Asn Gly Ala Gly Ala Ala Leu Ala Met Ala Asn Ala Leu Arg 275 280 285 Asp Ala Gly Ile Glu Ala Ser Gln Ile Gly Tyr Val Asn Ala His Gly 290 295 300 Thr Ser Thr Pro Ala Gly Asp Lys Ala Glu Ala Gln Ala Val Lys Thr 305 310 315 320 Ile Phe Gly Glu Ala Ala Ser Arg Val Leu Val Ser Ser Thr Lys Ser 325 330 335 Met Thr Gly His Leu Leu Gly Ala Ala Gly Ala Val Glu Ser Ile Tyr 340 345 350 Ser Ile Leu Ala Leu Arg Asp Gln Ala Val Pro Pro Thr Ile Asn Leu 355 360 365 Asp Asn Pro Asp Glu Gly Cys Asp Leu Asp Phe Val Pro His Glu Ala 370 375 380 Arg Gln Val Ser Gly Met Glu Tyr Thr Leu Cys Asn Ser Phe Gly Phe 385 390 395 400 Gly Gly Thr Asn Gly Ser Leu Ile Phe 405 

1-16. (Canceled).
 17. A method for altering the fatty acid composition of a host cell comprising: a) transforming a host cell with a nucleic acid construct comprising a nucleic acid sequence encoding an engineered β-Ketoacyl-acyl carrier protein synthase having altered substrate specificity; and b) growing said host cell, wherein said host cell has an altered fatty acid composition as compared to average fatty acid composition of an unmodified host cell.
 18. The method according to claim 17 further comprising: c) transforming said host cell with a second nucleic acid construct comprising a nucleic acid sequence encoding a protein involved in fatty acid biosynthesis.
 19. The method according to claim 17, wherein said nucleic acid construct further comprises a nucleic acid sequence encoding a protein involved in fatty acid biosynthesis.
 20. The method according to claim 19, wherein said protein involved in fatty acid biosynthesis is a mangosteen 18:1 thioesterase.
 21. The method according to claim 19, wherein said protein involved in fatty acid biosynthesis is Cuphea hookeriana FatB2.
 22. The method according to claim 17, wherein said nucleic acid construct comprises a transcription initiation region.
 23. The method according to claim 17, wherein said nucleic acid construct comprises a chromosomal vector.
 24. The method according to claim 17, wherein said engineered β-Ketoacyl-acyl carrier protein synthase is capable of accumulating more long chain fatty acids in said host cell within a transgenic plant compared to a wild-type plant.
 25. The method according to claim 17, wherein said engineered β-Ketoacyl-acyl carrier protein synthase is capable of accumulating more long chain fatty acids in said host cell within a transgenic plant compared to a β-Ketoacyl-acyl carrier protein synthase having at least one fewer residue substitution and said host cell is present within a differentiated plant or part thereof.
 26. The method according to claim 17, wherein said engineered β-Ketoacyl-acyl carrier protein synthase is capable of an increased ability to utilize C6-ACP substrates for elongation compared to a β-Ketoacyl-acyl carrier protein synthase having at least one fewer residue substitution and said host cell is present within a differentiated plant or part thereof.
 27. The method according to claim 17, wherein said engineered β-Ketoacyl-acyl carrier protein synthase is capable of a reduced ability to utilize C8-ACP and longer substrates for condensation while still able to use the C6-ACP for elongation to produce C8 fatty acids.
 28. A method of altering levels of molecules formed from available free fatty acids comprising: a) transforming a host cell with a nucleic acid construct comprising a nucleic acid sequence encoding an engineered β-Ketoacyl-acyl carrier protein synthase having altered substrate specificity; b) growing said host cell, wherein said host cell has an altered level of molecule formed from available free fatty acids as compared to average levels of molecules formed from available free fatty acids of an unmodified host cell; and c) thereby altering said levels of molecules.
 29. The method according to claim 28, wherein said molecules formed from available free fatty acids includes a plant triglyceride.
 30. A host cell comprising a nucleic acid sequence encoding an engineered β-Ketoacyl-acyl carrier protein synthase having altered substrate specificity, wherein said host cell has an altered fatty acid composition as compared to an average fatty acid composition of an unmodified host cell.
 31. The host cell according to claim 30, wherein said host cell is an animal cell.
 32. The host cell according to claim 30, wherein said host cell is a plant cell.
 33. The host cell according to claim 32, wherein said plant cell is present in a plant.
 34. The host cell according to claim 33, wherein said plant is a temperate oilseed crop plant.
 35. The host cell according to claim 30, wherein said host cell comprises a cell of a plant.
 36. The host cell according to claim 30, wherein a hydrophobic residue of said engineered β-Ketoacyl-acyl carrier protein synthase is selected from the group consisting of amino acid residues at a position corresponding to residue 108, 111, 114, 133, 134, 138, 162, 193, 197, 202, and 342 of SEQ ID NO: 47 and is substituted.
 37. The host cell according to claim 30, wherein the amino acid sequence of said engineered β-Ketoacyl-acyl carrier protein synthase has a substitution of at least one amino acid residue selected from the group consisting of amino acid residues at a position corresponding to residue 105-120, 130-140, 190-200, 340-345, and 400 of SEQ ID NO:
 47. 38. The host cell according to claim 37, wherein said substitution of said at least one amino acid residue is of a hydrophobic residue.
 39. The host cell according to claim 30, wherein the amino acid sequence of said engineered β-Ketoacyl-acyl carrier protein synthase has a substitution of at least one amino acid residue selected from the group consisting of amino acid residues at a position corresponding to residue 108, 110, 111, 113-116, 133, 134, 138, 139, 193, 197, 198, 203, and 204 of SEQ ID NO:
 47. 40. The host cell according to claim 37, wherein said substitution of said at least one amino acid residue is to a larger residue and said altered fatty acid composition has more short chain length fatty acids.
 41. The host cell according to claim 37, wherein said substitution of said at least one amino acid residue is to a larger residue and said altered fatty acid composition has more long chain length fatty acids.
 42. The host cell according to claim 37, wherein said substitution of said at least one amino acid residue is to a larger residue and said altered fatty acid composition has fewer long chain length fatty acids.
 43. The host cell according to claim 37, wherein said substitution of said at least one amino acid residue to a smaller residue and said altered fatty acid composition has fewer short chain length fatty acids.
 44. The host cell according to claim 37, wherein said substitution of said at least one amino acid residue widens the hydrophobic fatty acid binding pocket.
 45. The host cell according to claim 37, wherein said substitution of said at least one amino acid residue is to a smaller residue and said altered fatty acid composition has an increase in branched chain fatty acids.
 46. The host cell according to claim 30, wherein said altered fatty acid composition is altered in the level of fatty acid selected from the group consisting of 6:0-ACP, 8:0-ACP, 10:0-ACP, 12:0-ACP, and 14:0-ACP.
 47. The host cell according to claim 30, wherein said altered fatty acid composition alters levels of molecules formed from available free fatty acids.
 48. The host cell according to claim 47, wherein said levels of molecules are levels of plant seed triglycerides. 